shimano xt br-m8100 disc brake black, left/front shimano updated, refined, and ready to dominate smooth ribbons of singletrack, shimano's xt br-m8100 disc brakes hit the trail once again with their lightweight, sleek aesthetics, and unbeatable stopping power. while a lot of the composition of the brake stays true to its predecessor, the 8000-series brake, like its two-piston design, integrated master cylinder, and clean black aesthetic, features a redesigned brake lever based on the xtr 9100 series that's optimized for refined ergonomics, allowing you to test the limits with confidence and control. and along with this improved bracing angle, its new mounting design pairs up with i-spec ev to save you space in the cockpit, so you've got plenty of room for dropper posts, remote lockouts, and accessories. the new xt 8100 brake lever packs in 10% more stiffness than the 8000-series, even under high temperature, this translates to quicker brake engagement, while the new mounting position makes for shorter free stroke. its new mounting position moves the clamp more inboard, which ads an extra contact point between the bar and lever. what this translates to is a drastic increase in efficiency and control over the bike, without limiting brake engagement. additionally, the lever stays the same over all of the 8100-series brakes, so you can maintain identical cockpit comfort from your rowdy enduro whip to your cross-country race machine.