2PCS Bike Derailleur Jockey Wheels 11T/13T for Shimano SRAM 8-11 Speed MTB Road
Weight: 11T(9g), 13T(12g). Upgrade your drivetrain with this2-piece rear derailleur pulley set, available in11T and 13T sizes for8, 9, 10, and 11-speed drivetrains. 2pcs Rear Derailleur pully. Apply for most of rear derailleur on the market.