absoluteBLACK HOLLOWcage Oversized Derailleur Pulley Cage - For Shimano Dura-Ace 9250 Full Ceramic Bearings Carbon Cage Titanium

absoluteBLACK HOLLOWcage Oversized Derailleur Pulley Cage - For Shimano Dura-Ace 9250 Full Ceramic Bearings Carbon Cage Titanium. The absoluteBLACKs HOLLOWcage® for Shimano Dura-Ace 9250 12-speed derailleurs makes the 9250 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 Dura-Ace 9250 drivetrains

Fits up to a 34t cassette

The Silent Xring Pulley dampens the chain impact on the guide pulley teeth eliminating the engagement noise

Incredibly silent (over 5-7dB noise reduction vs stock)

HOLLOWcage uses full ceramic bearings (Silicon Nitride ceramic balls and Zirconia Oxide ceramic races) that make the guide pulleys incredibly stiff for greater shifting precision

One of the lightest oversized cages on the market (71g)