Road Bike Carbon Fiber Rear Pulley Guide Wheel 5800 7000 8000 9000 Bicycle Accessories guide wheels all black

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