Shimano xtr m9020 trail disc brakeergonomic powerful and compact servo wave xtr hydraulic disc brake lever is performance optimized with full adjustability on the fly shimano xtr cutting edge braking technology lightweight and powerful easily adaptable post style hydraulic disc brake caliper caliper features oversized 22mm glass fibre phenolic pistons optimized for heat insulation lightweight and stiffness opposed 2 piston design reduces leading effect and optimal pad wear increases braking