The SRAM Apex Rear Shift / Front Hydraulic Disc Brake has been designed with X-ACTUATION Technology to ensure sharp, dependable shifting. Designed specifically for SRAM s Apex series which offers an 11-32 cassette paired with a compact crankset, the Apex Shifter offers dependable, durable shifting, access to premium level technologies and exceptional value for money. The Apex delivers quiet confidence in every ride, ensuring that you stop exactly when you need to, perfect for those that want a capable 2x setup that won t break the bank. SRAM Road EXACT ACTUATION Technology11-Speed CompatibleUses DOT 5.1 Brake FluidTwo Piston Hydraulic CaliperForged Aluminium Disc Caliper Steel-Backed Organic Pads and Steel HardwareCompatible with 160mm and 140mm Brake Rotors