HOLLOWcage Oversized Derailleur Pulley Cage for Shimano Ultegra 8150 Elite smooth block-in-block transition knobs provide

smooth block-in-block transition knobs provide grip and support through turns

so it retains preload far better than the competition and is impervious to the ill effects of load spikes from large hits and heavy braking

training tips

and brake calipers that reduce brake effort by up to 80%

HOLLOWcage Oversized Derailleur Pulley Cage for Shimano Ultegra 8150 Elite smooth block-in-block transition knobs provideThe absoluteBLACK's HOLLOWcage for Shimano Ultegra 8150 12 speed derailleurs makes the 8150 drivetrain whisper quiet. It features a carbon polymer mono plate construction with bespoke, oversized, full ceramic bearings and one of the most advanced silencing pulleys ever made. Designed for use with Shimano Ultegra 8150 drivetrains Fits up to a 34t cassette The Silent Xring Pulley dampens the chain impact on the guide pulley teeth, eliminating the