Shimano Deore XT BL-M8100/BR-M8120 Disc Brake and Lever - Front, Hydraulic, Post Mount, 4-Piston, Finned Pads, I-SPEC EV Clamp Band, BlackThe Deore XT M8100 hydraulic disc brake is designed to provide high performance braking for a variety of MTB riding styles. Includes the brake lever and disc brake caliper. Brakes are pre bled BL M8100 features a stiffer brake lever design that provides added support for aggressive riding Servo Wave Action technology means quicker brake engagement with shorter free stroke The BR M8100 2 piston brake caliper is optimized for cross country riding styles