SRAM Sl 1150 R2C Aero Rear 11Sp Shifter The addition of the r2c (return to center) shifters transforms any of SRAM road groups into the perfect aerodynamic weapon Provides fast, consistent and Lite action shifting throughout the entire gear range Return-to-center design with carbon lever blades Fits 19.2-22.5mm internal bar diameter with a minimum depth of 35mm