The CeramicSpeed OSPW X SRAM Alternative Force1/Rival1 T3 Clutch is a fast oversized pulley wheel system with a 14T upper and 18T lower pulley wheel with a narrow-wide profile. The super strong carbon pulley cage allows us to choose between two spring tension settings to fully customize the performance and further reduce chain drag. Compatible with SRAM Rival and Force 1 Type 3 derailleurs.