The absoluteBLACK's HOLLOWcage Oversized Derailleur Pulley Cage for Shimano 9100 / 8000 features a revolutionary mono-plate design to provide quiet and precise shifting.

• Designed for use with Shimano Dura Ace 9100 / 9150 / 9170 , and Ultegra 8000 / 8050
• Fits up to a 32T cassette
• The Silent Xring Pulley dampens the chain impact on the guide pulley teeth, eliminating the engagement noise
• Flexible cage design aligns better with the angle of the chain when using the higher gears of the cassette
• HOLLOWcage uses abnormally large, bespoke, full ceramic bearings that make the pulleys incredibly stiff for greater shifting precision
• Upper pulley features tall teeth to provide improved shifting precision