Carbon-polymer mono-plate construction with bespoke, oversized, full ceramic bearings and the most advanced silencing pulleys ever createdCompatible with Shimano Dura Ace 9100 / 9150 / 9170 , Ultegra 8000 / 8050. Fits up to 32T cassetteProprietart pulley design is able to reduce the sound level by 12-14dB when compared to stock Dura Ace pulleysMono-plate cage dynamically reacts to chain angle for reduced friction and lost wattsComplete cage, lockring tool, 2x spare xring rubbers, 14ml GRAPHENlubeOne of the lightest oversized cages on the market32TBlackShi 9100/9150/800/8050