SRAM Avid Elixir X0 Trail Rear Disc Brake Ambidextrous alloy Taperbore lever body with carbon lever blade is Matchmaker X (MMX) compatible and has tool-free reach and Contact Point adjust TaperBore closure system saves weight, looks super-sleek, improves lever feedback and most importantly-gives you more power and control Power Reserve Geometry multiples the force your hand generates; On other brand brake levers, your fingers tend to slip off the ends as you pull Lightweight 4-piston, dual diameter, 2-Piece forged aluminum calipers feature top loading pads, DOT 5.1 fluid and adjustable banjo angle Recommended HS1 rotor and mounting bracket sold separately