ABSOLUTEBLACK HOLLOWcage 9100/9150/8000/8050 RD

Carbon-polymer mono-plate construction with bespoke, oversized, full ceramic bearings and the most advanced silencing pulleys ever created Compatible with Shimano Dura Ace 9100 / 9150 / 9170 , Ultegra 8000 / 8050. Fits up to 32T cassette Proprietart pulley design is able to reduce the sound level by 12-14dB when compared to stock Dura Ace pulleys Mono-plate cage dynamically reacts to chain angle for reduced friction and lost watts Complete cage, lockring tool, 2x spare xring rubbers One of the lightest oversized cages on the market