The Shimano XT BR-M8120 and BL-M8100 combo delivers serious 4-piston trail braking performance for demanding mountain bike terrain, pairing a powerful rear caliper with a refined lever that offers consistent modulation from the first touch to full power.

• 4-piston caliper design provides stronger, more consistent braking than 2-piston units
• XT-level trail-optimised caliper geometry for heat management on long technical descents
• BL-M8100 left lever with reach and free-stroke adjustment for a personalised feel
• Mineral oil hydraulic system for low maintenance and consistent performance in wet conditions
• Rear caliper supplied with 170mm hydraulic hose — suitable for standard MTB frame routing

Shimano XT has long been the reference standard for trail MTB hydraulic braking, and the M8120 generation refines the system further. The 4-piston caliper provides greater pad contact area for powerful, controllable stopping on loose or steep terrain. The BL-M8100 lever features tool-free reach adjustment and a servo-wave mechanism that allows a longer lever stroke without sacrificing modulation near the handlebar.

The BR-M8120 caliper uses a flat mount or post mount adapter (sold separately) and is compatible with Shimano Centre Lock or 6-bolt rotors. In Australian setup, the left lever controls the rear brake. Compatible with Shimano mineral oil only — do not use DOT fluid. Hose length 170mm.