CeramicSpeed Sram 11s 1xT3 Clutch OSPWCeramicSpeed SRAM 11s 1 x T3 Clutch OSPWThis high-quality OPWS is specifically designed for use with your SRAM Rival or Force 1 type 3 derailleur for outstanding performance optimisation. This model wraps your chain around its 14T upper and 18T lower narrow-wide pulley wheels for reduced friction and watt savings starting at 2.4W, so you can enjoy increased speed and a more efficient drivetrain.Features: Material: Pulley Wheels: Aluminium; Cage: Carbon reinforced PA Compatibility: SRAM Rival or Force 1 Type 3 Pulley Wheels: 14T upper and 18T lower narrow-wide pulley wheels Cassette Compatibility: Fits cassettes up to 42-tooth Speed: 11 speed Use: Road, GravelBuy CeramicSpeed Components from Chain Reaction Cycles, the World's Largest Online Bike Store.