CeramicSpeed pulley wheels reduce friction, last 3-5 time longer than stock high-end pulleys, and are designed to work with less drag.These pulleys are compatible with all 11-speed rear derailleurs that aren’t XT or XTR. Precision machined aluminum pulleys. Hardened races. Includes: (2) 11 tooth pulley wheels, (4) spacers and CeramicSpeed Bearing Oil 15ml bottle. Premium Grade 3 Silicon Nitride Ceramic balls. Hand built in Denmark. Item Specifications: Fits Brand, , Drivetrain Speeds, 11,.
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