Shimano Deore XT BL M8000 Disc Brake Set. Shimano has yet again upped the off road performance ante with the release of their new, stellar Deore XT M8000 groupset. And part of this superb set of mountain bike components is the Deore XT BL M8000 Disc Brake Set. These M8000 hydraulic brakes have been engineered to deliver more stable brake performance in various conditions, without having to change the lever position which means they're more adjustable and easier to operate without sacrificing power. And speaking of power, they're more powerful than ever, and have been redesigned to be more suitable and controllable for all styles of Mountain Bike riding, from cross country to freeride and downhill. The Deore XT M8000 brake set also features Shimano's easily adjustable system for the perfect lever and caliper position. Additionally, its oversized ceramic pistons ensure precise braking characteristics and excellent heat handling abilities, with less wear over time than other materials.