One Less Barrier to Cross; The new SRAM Force 1 groupset is a complete high-performance 1x11 cyclocross drivetrain created by blending the best of SRAM's revolutionary XX1 mountain bike and road technologies. This is a single-ring, 11-speed complete drivetrain that is lighter, simpler, and tougher while offering a clean look and optimal gear selection for cyclocross.The SRAM Force 1 Hydraulic Disc Brakes provide better speed modulation and braking performance in all conditions. Made with a forged aluminium disc caliper with stainless steel backed pads and stainless hardware.The Connectamajig is the coupling hose that makes initial set-up of SRAM road hydraulic brake systems easy, fast and convenient for the factory, craft builder, or dealer. The intimidation of hydraulics is gone with a push and a twist, its just that easy.Forged aluminum disc caliper/ stainless hardwareLeft rear: 1800mm wDirect mount hardware18mm rear pistonRotor and bracket sold separately