SRAM Red HRD Brake / Shifter + Hydraulic Disc Caliper - Left - 2 Speed - 1800mmSRAM Red HRD Brake Shifter + Hydraulic Disc Caliper Left 2 Speed 1800mm If you believe in better performance then you should believe in hydraulic road (HydroR) brakes. SRAM's award winning HydroR technology is the fulfillment of the promise of better braking, more control, and improved performance in all conditions. SRAM RED is delivering on the promise of braking confidence and security that brings speed control and stability to a new level. RED