The CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low-friction bearings and unique overall design.

• Features a 15-tooth upper and 19-tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls to provide absolute optimization of the rear derailleur
• Robust cage crafted from carbon reinforced polyamide for durability and light weight
• Two spring tension settings allow customized setup based on ride conditions
• Fits cassettes from 10 to 36-tooth
• Standard hardened steel bearing races
• Not compatible with SRAM Rival AXS