Bicycle Gearing System
For transmissions, there are levers and rear derailleur. A rear derailleur is a transmission in the rear part of a bicycle. With the rear derailleur, you can enjoy various shift stages. In general, there are 10 levels in addition to 7 to 8. The rear derailleur can be adjusted by yourself, and if you do not adjust it, the ride comfort of the bicycle will be worse. Also note that the optimal rear derailleur changes depending on whether it is attached to a mountain bike or road bike.
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