Shimano Deore XT BR M785 Disc Brakes. Lighter, more powerful, and more compact than ever the Shimano XT BR M785 Disc Brakes is sporting some serious upgrades from its 2012 overhaul. The short stroke Servo Wave mechanism delivers quick pad engagement and plenty of power that's easily controlled with a single finger. While the amount of stopping power is remarkable, there's no need to fret about the heat generated as you scrub scrub all that speed due to the oversized ceramic pistons providing heat insulation for the brake fluid plus caliper fins further dissipating heat. Combine with an appropriately sized Ice Tech rotor for optimum braking performance to match your riding style. So whether you're racing singletrack or shredding more aggressive trails, this brake is designed to meet the demands of your riding style. Note that i Spec B brake levers do not integrate with shifters that have the original i Spec. They can be used separately, with separate clamps, but they do not integrate.