The BBB Rollerboys replacement rear derailleur pulleys has ceramic bearings to keep your drivetrain running as smoothly as possible. The BBB Rollerboys ceramic bearings gives an ultra-smooth feel and provides almost no resistance, which equates to more power being transfered to speed! Composite material provided by EMS Swiss, with 40% glass-fiber mixture.

Compatible with:

(10T) Shimano 7 and 8 speed; Campagnolo 8, 9, and 10 speed; SRAM ESP up to 2004

(11T) Shimano 9 and 10 speed; SRAM 10 speed

Shipping Weight: .5 lb.