●Internal cartridge bearings allow for light lever throw and positive actuation under load. ●Precise ergonomics put the shift lever where you want them. ●A good derailleur can effectively reduce cyclist fatigue while riding, making riding more comfortable and convenient. ●The derailleur allows you to adjust the pedaling speed and energy consumption, and the function keeps expanding to more value-added parts. ●This gear shift lever is suitable for most bikes on the market, such as mountain bikes, road bikes, electric bikes, lady bikes, folding bikes, etc.