Shimano BR-M9100 Rear Disc Brake Kit XTR Race BL-M9100 Left Lever

Pickup currently unavailable at 132 Union Road


The Shimano XTR BR-M9100 Disc Brake is the flagship XC brake from Shimano. With its legendary XTR status, these brakes deliver improvements over the previous generation. They are lighter in weight yet they offer incredible brake rigidity and control. The new lever design moved the brake clamp position inboard which creates another point of contact for the bar and lever that offers increased efficiency and control. It does all this whilst reducing its footprint on the cockpit. The 1-piece aluminium caliper has also had a weight reduction and delivers an improved linear braking response.

Are the brakes bled? The brakes are Shimano J-Kit which means they are fully bled in the factory and the brake line is disconnected at the lever end to allow for easier installation on frames with internal routing. The brake line is capped and the lever plugged and the olive is shipped inside the brake lever. If you don't need to trim your brake lines you can reattach the brake line without the need to bleed your brakes.

See the link to download the installation instructions below!


  • High-performance brake control with reduced input force at fingertips highly linear response, and braking power, stroke, and time lag reduced by 30% compared with M9000
  • New high rigidity brake hose and 1-piece aluminium caliper
  • One Way Bleeding
  • Ceramic pistons
  • I-Spec EV compatible
  • Lightweight at 26g (vs. BL/BR-M9000 with disc brake rotor)



  • 2 Finger Lever size
  • Straight Hose Joint
  • I-Spec EV
  • Magnesium master cylinder
  • Carbon Lever
  • Reach adjust (with tool)


  • 2 Piston
  • Weight: 312g
  • SM-BH90-SS Brake hose
  • Post-type Mount
  • Uses Mineral Oil
  • One way bleeding
  • Pads: K02Ti Resin pad w/o fin, w/ titanium back plate, K04Ti Metal pad w/o fin, w/ titanium back plate
  • Hose Length (Front/Rear): 1000mm, 1700mm
  • Recommended Rotor: RT-MT900
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