KCNC Big Jockey Wheel System

Fully aluminum CNC made big pulley kit

This big pulley kit reduces drive resistance by enlarging the rear derailleur pulley. It features
lightweight 7075 aluminum pulleys
, stainless steel bearings
, and a narrow-wide pulley design to reduce the risk of chain dropouts.
Tooth Count: 12T + 16T.
Reference Weight: 60g.
Made in Taiwan.
Compatible with:
Shimano 12-speed RD-R8150/RD-R8100 and
Shimano 11-speed RD-R9100.