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A. Hubs for commuting:
1. Ordinary single speed hub
The most common type that can be replaced with a flywheel is generally made of iron, loose beads, and some have bead nests.
Ordinary single speed hub
2. One fly single speed hub
Relative to the high-end commuter bike, it has a tower base structure and the flywheel can be replaced separately. Generally 14 teeth.
One fly single speed hub
3. Internally geared hub
Commuter cars generally use internal three-speed hubs.
Internally geared hub
4. Inverted drum brake hub
It has a rear hub that drives the brake mechanism when the chain rotates in the reverse direction.
Inverted drum brake hub
B. Mountain bike hub:
As a hub designed for mountain cross-country riding, most hubs use 32 spokes and 36 spokes.

1. Ordinary Mountain V Sha Hub
Front axle axis 9mm 100mm open crotch
V brake mountain hub with rear axle opening of 135mm

2. Ordinary (135MM) mountain disc brake hub
Front axle axis 9mm 100mm open crotch
The rear axle is a mountain hub with a width of 135mm and is reserved for mounting holes for disc brakes.

C. Bucket hub
The barrel hub was born to adapt to more intense off-road riding, and its strong hub is its hallmark. The barrel axle must be used with the frame and front fork.

Specifications of the front hub
1: 15mm100mm open crotch barrel shaft
2: 20mm110mm open crotch barrel shaft
Rear hub specifications
1: 10mm diameter 135mm open crotch barrel shaft
2: 12mm diameter 135mm open crotch barrel shaft
3: 12mm diameter 150mm open barrel shaft

D. Road bike hub

The hub of the road bike is named for road riding. Its focus is on smooth rolling and minimal power loss.
The classification of hubs for road bikes is relatively simple, only the number of spokes used is different, and the compatibility of the tower base and the flywheel is generally used. 28 spokes are generally used.

E. Track Bike hub
The special hub used in the indoor Track Bike is characterized by dead flying, that is, there are no tower bases, jacks, and other components, and the wheel sprocket rotates along with it, and the higher flower disks (where the spoke holes are located) are fixed with nuts, In some venues, there is a flywheel with a different number of teeth on each side of the hub, which can be exchanged.The special hub used in the indoor Cross Country Bike is characterized by dead flying, that is, there are no tower bases, jacks, and other components, and the wheel sprocket rotates along with it, and the higher flower disks (where the spoke holes are located) are fixed with nuts, In some venues, there is a flywheel with a different number of teeth on each side of the hub, which can be exchanged.

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