ZTTO Road Bike Carbon Fibre Derailleur Cage With 16T Ceramic Jockey Wheel Oversize Lower Pulley 8800RD

Description

Effectively increase the inertia of chain power Reduce chain friction and make the chain stable Strengthen the structural safety of rocker arm bracket Stable and fast transmission Smooth out riding efficiency Slope climbing saves effort and frequency stepping improves effectively All-ceramic resistance free bearing, reducing friction power consumption