When you are struggling to save money and buy a new bike, it feels really good to get a new bike. You fall in love with its beautiful painting, the wheelset that moves with just one step, the extremely precise shifting…use your free time to accompany it, and even sleep with it at night. However, as time passed, until one day, you started to ignore it, and your bike ran to you and asked you: “So love will disappear, right?” But you look at your friend’s pair of lighter wheels. Groupset, that set of faster gear shifting… Is the boat of friendship between you and your bike overturned? I don’t think so, it may just need a little maintenance, and then it will come back to you full of energy. Here are some common glitches to help you realize whether your bike is starting to slow down, and how to fix it. 1. abnormal noise in the bottom bracket Once your bike can be walked on as soon as you step on it, now it is replaced by a kind of swing between the cranks and a faint sound. The bottom bracket is located at the bottom bracket of the frame, and the direct PowerPoint of the whole bike: the chainring is rotating around it. As time goes by, the bearings in the bottom bracket begin to wear, and over time, unhealthy conditions will appear. Generally speaking, when to replace the bottom bracket depends on your riding intensity and mileage. When you step on it, you feel more strenuous. After a while, you will hear some unfriendly “creaking noises”. At this time, you have to think about whether the bottom bracket is causing trouble. After you confirm that the bottom bracket is faulty, it is recommended to replace the bottom bracket directly in this case. Replace worn and consumable parts to improve transmission efficiency. Worn bottom brackets must be replaced! 2. Worn tires Shoes have a great influence on clothing, right? The tires are bicycle shoes. High-quality tires can turn a slow bicycle into an amazing speed machine. First of all, old tires will be very weak and may leave scratches or perforations on the rubber, which means that tire blowouts can easily occur when the bicycle is driving. So, if your tire looks cracked, replacing it as soon as possible is the best option. In the case of a flat tire and a flat tire on the road, first aid is needed. At this time, the Beto pump that I carried with me came into use. The tires on road bikes have very low rolling resistance. Most of them are folding tires. These tires are made of a flexible rubber compound and have a high TPI (TPI: the mesh density, which is simply: Number of rubber fibers per inch). On mountain bikes, the choice of a tire depends on the place and the conditions you want to ride. You want to roll faster on dry terrain, and grip is your number one problem in wet environments. 3. The transmission is not working Do you have this encounter? You plan to conquer the mountains in front of your friends, but you stop pedaling mid-range. What happened? The transmission “strikes”, right? There are many reasons for the “strike” of the transmission. First of all, it takes time for the transmission to send the speed signal sent by the finger dial or manual change to the front or back dial, and then the front and rear dials will complete the speed change. If there is a problem in this step, it is very likely that the line pipe system is worn and worn. At this time, you need to replace a new line pipe system, which may cost you some dollars. If it is in other cases, it is necessary to consider whether the chain, chainring, and flywheel are worn out. If you maintain these parts frequently, their wear rate will become very slow. In this case, push your bike to a bicycle shop, replace the worn parts, and your bicycle will look new. 4. Upgrade your wheelset Unless you spend a lot of money when buying the whole bike, most bikes are equipped with fairly entry-level wheels. It is understood that novice riders may think that the entry wheelset is not bad, but the original wheelset will soon be “not enough to ride” after the entry. The wheelset has a great influence on a bicycle. The lighter low-frame wheels will greatly reduce the overall weight of the bicycle, which will help to conquer the mountains in your mind. The high-frame wheels will bring you excellent aerodynamic advantages and bring you unimaginable speed. And many wheels will respond quickly and roll quickly, so goodbye to dragging your feet. If you want to upgrade your bike without having to buy a new frame will make a big difference, then upgrading the wheels is your best choice. 5. Small abnormalities in the cushion Feeling wrong while riding? Are you uncomfortable sitting? As the riding time changes, your old cushion may no longer meet your needs. Choosing the right cushion will alleviate the pain caused by this problem. Many people are thinking about how to get better fitness benefits from bicycles, but they ignore the pain caused by cycling. Incorrect riding posture can cause various problems: knee pain, hip pain, back pain, wrist pain. This situation can be alleviated by learning from others’ riding postures and doing static or dynamic fitting (fitting is not a one-time fit, as the riding time increases, the body’s adaptability is also changing, such as weight and flexibility. Wait, the bicycle also needs to be changed at this time).
As one of the core components of the bicycle, the answer to whether the wheelset needs regular inspection and maintenance is obvious: If you want it to maintain a better condition and have a longer life, then it must be maintained regularly. First, through careful inspection, understand the usage or remaining life of the wheelset. If it is damaged or unusable, it can be replaced further, so that the wheelset can be kept in the best condition at any time, and you can ride with peace of mind. The first is the inspection, the inspection of the wheel system: 1. Bearing and quick release Is the tightness of the quick release normal? It is recommended that two fingers can not be pulled by force, if the original factory has a calibrated torque value, it would be better. When your quick release is locked and you feel that the wheelset can move laterally or there is a lateral frame, your bearing may have a problem; if you cannot rotate the wheel smoothly, then the bearing may be too tight or the inside may be rusted. In either case, you need to disassemble and adjust the quick release lever or bearing. If you are riding in a good environment, dry and free of sand, it is recommended to clean the bearings and re-oil them every 2-3 months. There is no need to remove them from the hub, just remove the outer cover, clean them with a rag and degreaser, if you have a compressed air gun, the effect will be better. If you are riding in wet, damp, and muddy conditions, and you are riding multiple times a week, it is recommended that you do these checks at least once a month. To check whether the bearings are worn, all you need to do is move them with your fingers and check for free rotation or friction. It is also recommended to check whether they have lateral frame volume, which is a symptom of wear. If the rotation resistance is great, it is recommended to replace them. Most rear hubs have two sets of internal bearings that need to be inspected and replaced, and the pawls and springs need to be cleaned and re-oiled. Clean and re-oil with the correct lubricant. Cheaper wheelsets usually use open bearing systems such as balls, which will require shorter cleaning and re-oiling and will require more regular inspections. Replacing these types of bearings is a relatively simple and inexpensive procedure. Note: Deep groove ball bearings do not actually need maintenance, just replace them if they are worn out. However, angular contact bearings such as Campagnolo and Shimano, commonly known as ball hubs, need to be disassembled for maintenance. Special ratchet structures may require special grease. 2. Does the wheel deflection? You can use the brake fast or the frame as a reference to check. When you rotate, observe that the space on both sides of the wheel has increased or decreased by more than 2mm, then your wheelset is not suitable. If you continue to ride in this state If it goes down, the deflection will become more and more serious, and it will bring certain dangers. 3. Is the surface of the spoke damaged or impact marks? Too high or too low-spoke tension will also accelerate the wear of the wheel. If any one of the spokes is loose, damaged, or broken, it will affect the rest of the spokes as an integral part of the wheelset, so it is recommended to check the spoke tension at a certain time interval, whether on mountain bikes or road bikes. In addition, this work is best performed by qualified technicians, and the correct tools must be used. If these tools are not used, the risk of damage to the spokes or caps will increase. 4. Is the braking surface of the rim smooth, or is there any deformation of the disc? Check with the naked eye and fingers for unevenness. Although the design mileage of the rim may be more than 40,000 kilometers, it may be greatly reduced if improperly maintained under wet and sandy conditions. If the sidewall of the rim brake is worn too thin, it will cause the rim to deform or crack under pressure. Whether it is aluminum alloy or carbon fiber, the inside and outside should be inspected at least several times a year. Check for cracks, that is, the braking surface is clean and there is no sign of damage to the rim edge, which may affect the correct fit of the tire or loss of tubeless rim sealant. For tube tires, check whether the wheel positions are correct and clean the tires regularly. In addition, it is best to use the original brake pads or brake pads recommended by the manufacturer to avoid unpredictable problems. Note: In addition, if the road bike uses aluminum rim brake rubber, it is necessary to regularly clean the metal chips embedded in the brake rubber, which can effectively avoid abnormal wear of the braking rim. 5. Are there any cracks in the tire? Is there any arc when viewed from the front? Are the bead and rim tightly integrated? Does the tube tire have a rubber opening, etc.? Before that, be sure to observe the recommended air pressure on the tires, and do not exceed or fall below the recommended air pressure, otherwise it is extremely likely to cause danger. Regardless of the tire system used, regular inspections are very important. If you use traditional-style tires and inner tubes, make sure that the inner tube is installed at the correct angle and there is no angle between the valve and the rim. For tubular tires, the most important aspect is the bonding process. If they are not correct, they will not be in the center of the rim, or in the worst case, they may detach during riding, causing serious injury to the rider. If you are not sure how to install tubular tires, it is recommended to ask a professional to help. For tubeless tires, replace the glue at least once a quarter, and occasionally check whether the air nozzle is properly tightened and there is no leakage. Regardless of the type of tires used (traditional, tubular, or tubeless), make sure that they do not show any signs of damage, cuts, or holes that could cause bursts. If this is the case, replace them immediately. Note: Regular cleaning of metal shavings, broken glass and small stones embedded in the tread can reduce the chance of a tire blowout.
The trend of using disc brakes on the road bike has gradually transitioned from the controversy in previous years to become popular now. Stronger braking force, more stable wheel fixation methods, and technological progress have reduced the weight of the groupset, which has led to the mass promotion of disc brake road bikes, and some major manufacturers have radically eliminated the rim brakes when they launched new models and type. There are many ways to install and drive disc brakes. Let’s take a look at the popular science, so that more riders have a clear understanding, and there is information for reference when upgrading or choosing their own tanks in the future. Disc brakes are distinguished according to the driving mode, which can be divided into the hydraulic disc drive, wire pull drive, and wire pull the hydraulic disc drive. 1. Hydraulic disc brake The principle is to use oil as the medium, compress the oil through the piston in the brake lever, and transmit the pressure through the oil to the caliper to rub the disc to act as a brake. This is what people often call “oil discs”; generally speaking, the oil pipes of hydraulic disc brakes are not affected by bending. Even if the oil pipes are folded to a more complicated angle, they can still provide excellent braking force. Most of the road models on the line choose hydraulic disc brakes. On the other hand, because hydraulic disc brakes must first ensure the sealing properties when using oily objects for transmission, hydraulic disc brakes have less force loss during transmission, and the force is direct, so gently pinch it down It can provide powerful braking force, which is also one of the biggest advantages of hydraulic disc brakes. At the same time, because of its closed system, the inside of the tubing is not invaded by dust, and the maintenance period is long. Compared with the advantages of hydraulic disc brakes, the comprehensive promotion of hydraulic disc brakes shows that its shortcomings can almost be ignored in daily use. The most important disadvantage is that on the one hand, there is not much advantage in weight, on the other hand, it is more troublesome to install and replace, especially in the application of inner wiring frame, which requires disassembly and oil filling, which greatly increases the working time. 2. Wire pull disc brake This is what people often call the “cable disc”. The brake pads in the caliper move by the pull of the brake wire to rub the discs and produce a braking effect. Cable discs have greater advantages in weight and maintainability and are usually cheaper than oil discs of the same grade. This is one of the reasons why low-end disc brakes will choose cable discs. On the other hand, when using the cable disc to upgrade from the clamper model, there is no need to change the hand change. However, because of the need for brake cables, the wiring of the cable tube cannot be bent significantly. When the fully hidden wiring method is now an advanced choice, the cable disc is almost invisible in the selection of high-end models; At the same time, the braking force of the cable disc is less than that of the oil disc, which makes many riders less confident when going downhill, and makes the film more difficult to adjust than the oil disc, and the probability of rubbing the disc is greatly increased. 3. Line pulling hydraulic disc brake The development of this product was made in the early stage to make up for the delay in the development of the hydraulic manual transmission by the transmission kit manufacturer. It is also aimed at many people who want to upgrade the disc brake but do not want to replace the manual change or want to neutralize the cumbersome installation of hydraulic disc brakes. A balanced product made with heavier weight. Its basic principle can be divided into a cable pull cylinder, which is directly pulled through the cylinder to connect the caliper or the brake cable. The former was used on the Giant model and has now been eliminated. The latter is currently the mainstream way of line-to-oil disc brakes. This design is close to hydraulic drive in terms of braking force, and is relatively low in weight and price, and is easier to maintain. The disadvantage is that it still can’t adapt to the full internal wiring design, and wiring needs to be considered. According to the installation method, it can be divided into flat clamp and a direct clamp. For the disc brake caliper, the early disc brake frame used the mountain bike’s direct mounting standard, which can be directly installed on the frame without a conversion seat. Subsequently, Shimano introduced the flat-mount caliper standard, which has been adopted by most frames. Used by vendors and kit vendors. Flat mount disc brake clamp Compared with the paperback specification, the size is smaller, lighter, and more beautiful. It is undoubtedly a good solution when road bikes are very sensitive to weight. The interface of the flat-mount clamp is more compact, which is conducive to the integration with the front fork. The biggest difference is that the screw is directly screwed into the clamp from below and fixed from the frame. In addition to the screw tightening method, the clamp has other structures such as tubing and piston The structure and so on are the same as direct mounting. Post mount disc brake clamp The early clamps adopted the design of mountain bikes. Two fixing screws passed through the clamps from above and fixed to the frame or front fork. Due to the different sizes of discs, large adapters were often needed. Increased weight and reduced aesthetics. Due to the small selection of disc diameters on road bikes, the importance of this wide-range adjustable design has been reduced and gradually replaced by plain packaging.
The tire is the only component on the mountain bike that directly touches the ground. Its change will directly affect the mountain bike's grip, road feedback, and bike's weight. Therefore, a set of suitable and excellent tires will make cycling more "simple" and more comfortable. Upgrading tires is also the most direct, simple, and "cheap" way to improve the riding experience. Of course, in addition to performance, reliability also directly determines the quality of the cycling experience. After all, no one wants to be "abandoned" by the tires in the "ghost place" of the village and the shop. So today, I will show you the relevant knowledge about mountain bike tires. 1. Tire width Tire width will be the most important mountain bike tire data for many riders. And determine its positioning (XC, Trail, Enduro, DH) by tire width, and choose based on this. In fact, this concept is not completely correct. What really determines the tire positioning of mountain bikes is the setting of the tread pattern and the related data of the tire teeth. Going back to the tire width itself, wider tires seem to mean better grip. In some cases, yes, but not all. The same type of tire, except for the tire width, when the rest of the data settings are consistent (including but not limited to wheel diameter, tire pattern, tire teeth, grade, tire pressure setting, rim width), wider The tire width has a larger grip area, which means better grip. However, this does not apply to different types of tires. Of course, the same product is not as wide as possible, it should be within a suitable range. Otherwise, wouldn’t the ultra-wide tires have long been popular? Relatively speaking, the wider the tire, the greater the rolling resistance, and balance and fit are the most important. In addition, the width of the tire also determines the size of the teeth. For the same type of tire, the larger the tire width, the larger the size of the tire teeth, which is similar to scaling up with the tire width at the same time. At the same time, the actual data of the tire width cannot be seen from the data alone. The rim matched with it is also an important factor in the actual data of the tire width. For example, the inner width of the rim, the rim with a hook, or the rim without a hook (of course the former has much more influence than the latter). Back to the data itself, there are currently two expression standards for the tire width of mountain bike tires: one is the traditional British specification; the other is the more accurate ETRTO value. Let's first look at the traditional British specifications. The expressions such as 29×2.5, 27.5×2.4, 26×2.6, etc. marked on the tire are the expressions of the British specifications for tire width. But in fact, the British specifications are not accurate. For example, the 29×2.2 version of the Vittoria Gato tire is actually converted to inches, and its tire width should be 55.8mm, but in fact, its tire width is 53mm (ETRTO value). The significance of the British specifications is to help consumers choose the specifications that suit them according to the environment and intensity of use, that is, most riders use tire width to determine tire positioning. But the author also stated above that this is not always applicable. The ETRTO value is the standard for accurately expressing tire width data. 2. Tire pattern/teeth As a "competent" mountain bike tire, the tread pattern/teeth suitable for the use environment and strength are very important. Because the tread pattern/teeth are the decisive factors of the tire grip, rolling resistance, and other mathematical factors. We can analyze it mainly by the shape, arrangement, and size of fetal teeth. The shape of the fetal teeth is the decisive set of the tire. Different fetal teeth used in different positions can be arranged and combined to achieve different effects. However, the author does not intend to discuss the fetal teeth, because each brand of fetal teeth has different design focuses and concepts, and the products designed are also different, so I cannot discuss them one by one. However, it is certain that the shape of the fetus teeth will have a lot in common under each major use positioning category, in other words, "all look similar." Maxxis'BEAVER, FREE FLOW, aspen, SCHWALBE Rocket Ron, and SCHWALBE Rocket Ron tires with XC positioning are mostly shallower, and the shape of the edge in the forward direction is more “pointed” to cater to the ground, which provides less rolling resistance and facilitates climbing, and Maintain speed. As for the effect brought by the fetal tooth shape, I will introduce a specific product as an example. Take the classic Maxxis DHF as an example. First look at the shape of the fetus in the middle. The middle tyre teeth are mainly responsible for “biting into the ground” and provide sufficient grip during riding. Some products designed specifically for the rear wheels will additionally consider “brake performance” (brake surface). The middle of the DHF adopts large particles of fetal teeth, which are arranged vertically. Provide enough grip, and excellent rolling. The tyre teeth in the middle of the DHF are composed of two shapes, the rectangular tyre teeth and the trapezoidal tyre teeth. The edge of the tyre teeth of the rectangular tyre teeth is inclined forward, which can better cater to the ground. At the same time, a certain braking performance can be improved. Trapezoidal tyre teeth can provide better grip, especially lateral grip when cornering. The side tyre teeth are very "aggressive" and tall and large, which can help in pumice road sections, the tyre teeth can pass through the surface pumice and touch the ground, keeping the bike’s grip controllable. The side fetus of DHF is also made of a mixture of two types of fetal teeth. One is a large-particle rectangular fetus with a high grip and can provide sufficient guidance for cornering; the other is to provide additional lateral and straight lines. Powerful “L” shaped tire teeth. The size of fetal teeth is another key factor in judging the tread pattern. It should be noted that this does not refer to the area of the fetal tooth, but its volume, in other words, the height of the fetal tooth. In most cases, the larger and higher the fetal teeth, the stronger the grip. This is because the fetal teeth can “bite the ground” deeper. This is particularly useful in rain battles or on muddy roads, so we can see that the height of the tires of rain tires is extremely high. But the size of the fetal teeth still depends on the situation, not blindly bigger and more grip. For example, in dry and hard road conditions, large and protruding fetal teeth can even be a disadvantage. Because the soil is hard, the tire teeth cannot “bite into the ground”, but the contact area will be less, which will result in greater rolling resistance and less grip. 3. Material In addition to the width of the tyre and the tyre/tread pattern, the material or technology used in the tyre is also very important (the technology here refers to the material technology). The same type of tire, using different grades of materials, its performance will be very different, the price, you know. Normally, the higher the grade of rubber, the softer and the more grip it has (Of course, it is not that the softer the rubber is the higher the grade, it depends on the products of each brand; at the same time, the softer the rubber material is not in all cases, the grip The better the ground, but in most cases it is). Different hard rubber and the soft rubber of the same tire (such as Shiwen’s blue line and purple line), the hard one usually rolls faster and has lower rolling resistance. But the soft rubber version usually provides better grip. But the softer the rubber, the faster it wears. Of course, the tires nowadays are also full of technology, and it is not uncommon to use different synthetic rubbers according to the different positions of the tire teeth. In addition, each mountain bike tire has its own unique technology to enhance product performance, such as adding wear-resistant materials to the sidewall to increase reliability and adopting certain technologies to reduce the probability of puncture. However, since each family is different, it is not easy for the author to make a unified discussion here.
1. Expand the contact area between the buttocks and the seat cushion, disperse the pressure, and reduce the local pressure on the buttocks. 2. The thick filler can absorb more shock and vibration from the frame. In fact, a wide and thick seat cushion does not necessarily reduce butt pain. Let's first look at the cause of butt pain: 1. Compression: When sitting on the cushion, the weight of the body presses on the small area of the cushion, which will generate a very large pressure, which will compress the capillaries and affect the blood circulation. 2. Shearing force and friction: When pedaling, the human body will sway slightly on the cushion, rubbing the edge of the cushion, causing friction, friction, and heat, which will soon cause pain and skin damage. The shear force generated by friction with the cushion combined with the compression effect further aggravates the blood circulation disorder. 3. Moisture: The moisture brought by sweat has aggravated the effect of shearing force. 4. Temperature: When cycling, the skin temperature, especially the temperature of the perineum will rise significantly. The rise in temperature speeds up the metabolism of the skin, and under the action of compression and shearing force, blood circulation is obstructed. At this time, the skin begins to die because it cannot get sufficient nutrients. Obviously, the generous and thick saddle has an advantage in oppression. But the wide and thick seat cushion will bring more friction and shear force. The large and thick seat cushion is not easy to wick away sweat and is more humid. The large and thick saddle will make the butt temperature higher. Of course, compression is the main cause of butt pain. Generosity will bring comfort, but because of the last three disadvantages, we also know that large and thick seat cushions do not always make us feel comfortable. The benefits of the first item can be felt by sitting on it, but as the riding time is longer, the adverse effects of the latter three items are greater. This is why some seat cushions are very comfortable to sit on, but long riding time will make us very painful. We all know that sitting on a sofa is not the thicker the filling layer, the softer it is. The comfortable high-end sofa, the hardness, and filling thickness are all carefully designed, too soft sofas are often relatively low-priced products, Sitting for a long time makes it uncomfortable. The same is true for the seat cushion. The seat cushion is very comfortable and soft after sitting on it, which may make you painful after riding for a period of time. The filling foam of the seat cushion has good or bad materials, and the same material has different densities. A good cushion will be considered as a good filling material, with a moderate density, or even layered filling. The upper layer has a lower density and the lower layer uses high-density materials so that it will have a more comfortable touch without being too dented. At the same time, after we sit on the saddle, the seat bone position sinks, and the edge part is easy to bulge and press other places. The shape of the saddle is also very important. Therefore, we must be selective in choosing a large and thick saddle, look at its design and workmanship, consult cyclists who have used it, and do not pursue magnanimity. Learn information about carbon fiber thin bicycle saddle by clicking here.
The fairy tale kingdom Denmark not only has more than 7,000 kilometers of beautiful coastline, dense forests, and open grasslands but also has 11,000 kilometers of bicycle lanes. In Denmark, the right of way for bicycles exceeds that of cars. In places with narrow roads, cars cannot be urged by honking because the bicycle is slow. Here, the bicycle is not only a means of transportation but also a sport that people love very much. As the epidemic hits, bicycles are more popular as a means of transportation and sports because they can maintain social distance. 60% of Copenhageners commute by bike According to statistics, in Copenhagen, more than 60% of citizens’ daily commute is done by bicycle. Bicycle tours are a major feature of Copenhagen. The reporter who led the reporter on a cycling tour was an 82-year-old Danish grandmother who was very agile in getting on and off the bike and cycling fast. She said that her health is mainly attributable to her insistence on cycling around the streets and alleys every day. She is also very proud to tell me that her “riding age” has been 79 years, and her goal is to “cycling age” for 100 years. Denmark not only has common two-wheeled bicycles but also various tricycles and four-wheeled vehicles, some with a body in the front and some with a body in the back. A reporter from the “Global Times” once talked with a father who rides a front bucket bike. He told me that when a child sits on a front bucket, parents can always understand their children’s needs and children can also see a wider view. He believes that a bicycle can take the whole family to travel together, which is more environmentally friendly and closer to nature than a car. He also particularly emphasized: “I think that driving the bicycle with the child with his own power can directly express the close love between parents and children, and it is more natural and delicate than the power from the engine.” The reporter also visited. In a bicycle design studio in Denmark, the staff here use their brains to design many bicycles with various uses. They will also make decorations for bicycles according to world trends, making bicycles a platform for individuality and aesthetics. Priority to bicycle road rights Of the 20 global bike-friendly cities selected in 2019, more than half are from Europe, including Denmark. The right of way for bicycles in Europe is a priority, that is to say, on the road, cars must give way to pedestrians and bicycles. When the road is very narrow, it is very difficult to whistle the cyclist in front or forcibly overtake the cyclist. Acts of courtesy, and will face a large number of fines. Here bicycles, like cars, can be insured. If the bicycle is lost or damaged, or the rider suffers any personal injury during the ride, he can apply for compensation from the insurance company. This is a guarantee to encourage the public to ride. Many people take the train to and from get off work every day and use bicycles to solve commuting problems from home to train station and from the train station to work. Not only folding bicycles but ordinary bicycles are also allowed to push the carriage. In 2020, Brussels has designated many bicycle lanes, and cars and pedestrians are not allowed to enter. The city government believes that bicycles are the perfect means of transportation during the epidemic. There is no need to worry about the risk of spreading the virus caused by the dense crowds of buses and subways, and it is faster and more efficient than walking. From January 1, 2021, Brussels, the capital of Belgium, will become a city with a 30-kilometer speed limit. Except for special vehicles such as fire trucks, police cars, and ambulances, all motor vehicles including buses must comply with the 30-kilometer limit. Speed limit. The Brussels City Government believes that the right to use roads is not exclusive to cars, and the needs of bicycles and pedestrians must also be taken care of. Therefore, with the support of a lot of scientific data, the 30-kilometer speed limit policy has been released, and bicycle enthusiasts can ride more safely and comfortably.
In recent years, many young talents have died of cancer. Cancer has become the number one killer that seriously threatens the health of people all over the world. Many people are chanting campaigns to prevent cancer, but is there really an inevitable connection? Can exercise really prevent cancer? So,can cancer be prevented? Researchers from the American Cancer Center published a research paper in the Journal of the American Medical Association: Internal Medicine, saying that through data analysis of 1.44 million people in the United States and Europe, they found that the incidence of at least 13 cancers in people who exercise for a long time is significantly lower! So far, this is the largest and most comprehensive study of articles on exercise and cancer incidence. The paper in the Journal of the American Medical Association integrates many previous research data, surveyed the daily exercise volume of 1.44 million people in Europe and the United States, and then compared the two groups of 10% who exercise the most and the 10% who exercise the least. The entire exercise research data statistics span from 1987 to 2004, spanning 18 years, and the cancer incidence data tracking time is longer. How can sports prevent cancer? What is the principle of exercise to prevent cancer? In recent years, sports medicine research, tumor experimental research, and tumor cause investigation have gradually revealed the mystery and clarified many new mechanisms. 1. Improve the body's immune function and help prevent cancer Studies have found that cancer cells can only grow and reproduce when they escape human immune surveillance; if a person's immune mechanism is intact, no cancer will occur; if cancer patients can maintain and improve their own immune function, they can effectively Suppress and defeat cancer. Studies have confirmed that regular exercise can effectively improve autoimmune function. For example, exercise can significantly increase the body’s immune cells such as T lymphocytes, B lymphocytes, and phagocytes, thereby enhancing the body's ability to prevent cancer. Exercise can also increase the level of interferon in the blood, and interferon is also the body’s immune enhancer, which has anti-cancer and anti-cancer effects. 2. Breathing in more oxygen is beneficial to inhibit cancer Exercise can make people inhale several to several tens of times more oxygen than usual. The human body's oxygen intake increases and the breathing rate increases. Through the frequent exchange of gas in the body, more carcinogenic toxins can be discharged and the incidence of cancer can be reduced. At the same time, cancer cells are anaerobic cells that require insufficient oxygen for survival and growth. The environment; the internal environment with sufficient oxygen is not suitable for the growth of cancer cells, so it is more conducive to inhibiting cancers latent in the body. According to the research of German sports medicine professor Van Aken: "A person gets more than 8 times more oxygen per day than usual, which can prevent cancer, and even if they have cancer, they can prolong their life." Mexican oncologists tested 100 cancer patients. Three years of experimental observations found that with 2 hours of oxygen therapy a day, the survival rate of cancer patients can rise from 32% to 88%. 3. Prevent cancer cells from "settlement" and "metastasis" Human blood circulation speeds up during exercise. At this time, cancer cells are like small sand in the turbulent flow. They are not easy to "stand on their heels". Therefore, it is not suitable for cancer cells to "settle" to form spreading and metastasis; they are often affected by immune function during blood flow. The strong immune cells are eliminated. 4. Exercise can cause more sweating and discharge more carcinogens Every time you exercise, you will sweat much more than usual. Excessive sweating can excrete carcinogenic poisons such as nitrite, acetone, chloroform, sulfur, phenol, strontium, lead, mercury, and beryllium that are accumulated in the body to prevent cancer. 5. Improve the activity of antioxidant enzymes and effectively remove free radicals The human body produces a large number of free radicals in its metabolism. The accumulation of excessive free radicals in the body can damage cell membranes, proteins, nucleic acids and induce more than 200 diseases. It can also cause cell mutations and develop cancer. However, the human body also has a system for removing these free radicals. The function of scavenging free radicals is called "anti-oxidation". For example, superoxide dismutase and glutathione peroxidase in the human body are antioxidant enzymes that can effectively scavenge free radicals. The higher the activity of antioxidant enzymes in the human body, the stronger the function of scavenging free radicals, which can prevent many diseases and even cancer. 6. Exercise regularly to control blood sugar levels and "starve" cancer cells Nobel Prize winner Dr. Otto Warburg discovered for the first time that cancer cells and healthy cells are fundamentally different in terms of energy metabolism. Cancer cells ferment glucose in an anaerobic environment. Its absorption of glucose is 3 to 5 times that of healthy cells. It directly uses blood sugar as nutrition and almost only eats sugar. Regular exercise can promote metabolism, control blood sugar, maintain a good blood sugar level, and can selectively “starve” cancer cells present in the body, which is beneficial to cancer prevention and anti-cancer. 7. Prevent fat and lose weight, reduce the risk of multiple cancers Studies have shown that obesity is closely related to the occurrence of certain cancers. Obesity in men can increase the incidence of colorectal cancer and prostate cancer; obesity in women can significantly increase the incidence of uterine cancer, cervical cancer, ovarian cancer, breast cancer, and gallbladder cancer. And regular exercise can prevent obesity and have a weight loss effect. People with normal weight should consume all the calories they take in through exercise every day to achieve a "balance of income and expenditure" to prevent gaining weight; while for obese people, the calories consumed every day should exceed the calorie intake, which is beneficial. lose weight. 8. Exercise promotes bowel movement, avoids constipation, and helps prevent cancer The stool of the intestinal cavity contains a variety of carcinogens and carcinogens. For people with frequent constipation, the carcinogens and carcinogens in the stool can stimulate the intestinal mucosa in a large area, high concentration, and for a long time and easily induce a variety of cancers. Exercise can promote bowel movements, accelerate bowel movements, reduce the concentration of toxins in the stool, reduce the area of contact with the intestinal wall, reduce the time to stimulate the intestinal mucosa, and greatly reduce the risk of cancer. 9. Female friends who insist on exercising are particularly effective in preventing women's cancer Medical experts conducted a 21-year investigation and research on 8,000 Japanese in Hawaii and confirmed the effect of exercise on cancer prevention. In particular, women benefit more from exercise. Research results show that exercise can regulate female endocrine hormones (such as estrogen, prolactin), thereby reducing hormone-dependent breast, ovarian, uterine, and other gynecological cancers by 50%. American cancer expert Jerome Bullock pointed out that the most reliable way to prevent gynecological cancer is to insist on aerobic exercise for 3 hours a week. Exercise can prevent a variety of cancers related to endocrine hormones. 10. Exercise can invigorate people and improve their ability to prevent cancer A well-known American oncologist pointed out: “Cancer is the failure of immune function, and the failure of immune function occurs after the mental balance is disrupted.” Clinical diagnosis and treatment have observed that about 3/5 of cancer patients are due to trauma and emotional depression. And suffering from cancer or causing cancer to develop. Persistent exercise can regulate the secretion of human hormones, promote blood circulation in the brain, invigorate people, and cultivate sentiment. Exercise can make the human body secrete the brain chemical substance called “the river of happiness of consciousness”-cephalin. The chemical substance can regulate the function of the nervous system, improve mental stress, exercise will, make people feel happy, help eliminate worries and worries and improve the ability to prevent cancer. Which cancer risks can be reduced? Regarding the cancer risks that exercise can reduce, this article studied 26 types of cancer and found that exercise significantly reduced the incidence of cancer. The percentage of reduction in the incidence of 13 types of cancer is shown in the figure. Of the top 10 cancers in China, 8 of them can reduce the risk through exercise. Esophageal adenocarcinoma was reduced by 42%! Liver cancer 27%! Lung cancer 26%! The cancers with the highest mortality rates for men and women in my country are lung and bronchial cancer, gastric cancer, liver cancer, esophageal cancer, colorectal cancer, accounting for three-quarters of all cancer deaths.In order to make the conclusion rigorous, the researchers analyzed the surveyed subjects’ race, geographic location, education level, age, body weight, smoking, drinking status, hormone therapy, and other conditions and found that the above conclusions are not affected. How long is the best exercise? Understand the principle that exercise can prevent cancer, so what exercises can prevent cancer, and how long is the appropriate exercise time? Experts from the American Sports Association believe that aerobic exercises such as jogging, cycling, and swimming are most suitable. The ideal exercise rhythm is three times a week for at least 30 minutes each time, or four times a week for at least 20 minutes each time. As long as you go to the gym and walk or jog easily, you can easily achieve this rhythm. It is important to persevere. In fact, in summary, exercise does not really prevent cancer from occurring. It can only help you exercise your body, regulate immunity, and reduce the chance of cancer, but excessive exercise will also reduce your body’s immunity! In addition, there are air, water sources, mentality, etc. that affect your health.Exercise is not omnipotent, but no exercise is absolutely impossible!
Braking is simple, just press the lever, but is it really that simple? Of course not, let's take a look at the correct way to break! The front brake is important Many novice friends don't like or are afraid to use the front brake. In fact, the front brake is still very useful. Especially in the case of emergency braking, the front brake is more efficient than the rear brake. But you need to pay attention to two issues. The focus should be shifted back if you don’t want to fly out. Also, the brakes are now very easy to lock, so be sure to pay attention when using the front brake. This can be felt slowly while riding. If it is downhill, you can't just use the front brake, you need front and rear cooperation.It is not recommended to use the front brake when cornering. It is easy to slip. When using the front brake, the wheels must be straight. The rear brake is not that safe Many friends think that it is safe to use the rear brake. In fact, the rear brake is also very dangerous, especially in the case of high-speed riding. If the rear brake force is too strong, the rear wheel will lock and the rear wheel will slide. Sand or slippery, the consequences are disastrous. Friends who often ride bicycles must feel this deeply. Of course, the role of the rear brake is still great, mainly depending on the road conditions and your riding situation. When riding slowly, in bad road conditions, such as slippery roads or when the front brake of the front wheel fails. The rear brake works very well. Do not brake to the end, it is better to brake if it is a particularly critical situation.There is no fixed requirement for left front right rear or left rear right front. It depends on personal habits to adjust. Is disc brake or v brake better? This is a problem that many novice friends struggle with. In fact, the two cannot be compared at all. Different types of things have their own advantages and disadvantages. The biggest advantage of the v-brake at present is that the structure is very simple and convenient for maintenance.Therefore,the v-brake is generally chosen for long-distance riding. Disc brakes can adapt to a variety of environments, and the rain will not affect the braking efficiency.
Mountain biking is an adrenaline-rushing sport that requires a high-quality bike with an equally sturdy frame. If you're a serious biker searching for an affordable, durable, high-performance mountain bike frame, look no more. Welcome to the Trifox bike – 29er Carbon MTB Hardtail Frame. Trifox bikes are widely-known for their high-quality mountain bike frames, built with precision and attention to detail. Among their many offerings, the MFM200 29er Carbon MTB Hardtail Frame is a feature-packed, affordable option perfect for both novice and experienced riders. 1.The Benefits of Carbon Fiber The Trifox bike MFM200 frameset is made of T800 carbon fiber Toray, which offers several benefits over other materials. Carbon fiber is known for its outstanding strength-to-weight ratio, making Trifox bikes some of the lightest and strongest options available. Moreover, carbon fiber offers superior vibration damping, making it ideal for a smooth and comfortable ride. 2.29er Carbon MTB Hardtail Frame The Trifox bike MFM200 frameset is a 29er Carbon MTB Hardtail Frame, designed to take on challenging mountain terrain with ease. This frame is built to be light, and it won't hold you back with its weight. The design is centered around providing a comfortable ride, with an emphasis on agility and precision. 3.BB68 Bottom Bracket The MFM200 frameset is built with a BB68 bottom bracket, an essential component that helps the rider achieve maximum power transfer. The BB68 is well-suited to mountain biking, providing optimal clearance, lightweight, and a secure fit. The bottom bracket is sturdy enough to handle the most challenging trails, making the MFM200 frameset an excellent investment for serious riders. 4.Weight One of the standout features of the Trifox bike MFM200 frameset is its weight. It weighs just 1200g, making it one of the lightest framesets available. Compared to other mountain bike frames on the market, the Trifox bike MFM200 is incredibly lightweight, making it easy to handle and ride for extended periods. 5.Better Than Your Average The Trifox bike MFM200 frameset is unlike any other affordable mountain bike frame. Its features, including the T800 carbon fiber Toray construction and the BB68 bottom bracket, represent a high-quality build that is unmatched in the price range. You’ll feel the difference when you're flying down the mountain on a Trifox bike, and the MFM200 frameset is the perfect base for a high-performance bike that will take you further and faster than you ever thought possible. If you're in the market for a mountain bike frame that will provide superior performance and durability, the Trifox bike MFM200 frameset is your answer. It offers exceptional value for its price and is among the best affordable options available. With its T800 carbon fiber Toray construction,BB68 bottom bracket, and lightweight design, the MFM200 frameset is the perfect base for a high-performance mountain bike. So, if you’re looking for a mountain bike frame that offers maximum fun and returns, check out the Trifox bike MFM200.
