HOLLOWcage Oversized Derailleur Pulley Cage for Shimano Ultegra 8150 Elite Being over a half-a-pound lighter

Being over a half-a-pound lighter than the other wheels in its aero category

Go further - reduce fatigue from bumps and vibrations

sunblock just adds another ingredient to the recipe for temporary blindness and discomfort

Made from 6061-T6 Aluminum

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

HOLLOWcage Oversized Derailleur Pulley Cage for Shimano Ultegra 8150 Elite Being over a half-a-pound lighterThe 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