The Shimano XTR M9100 comes with many upgrades over the previous generation. The Shimano XTR BR-M9120 Disc Brake is the enduro race version of the XTR brakes designed with 4 pistons for extra stopping power for more aggressive riding. The BR-M9120 has 10% more braking power than the M9020.
10% more braking power over the M9020
Four-piston caliper for increased power over the BR-M9100
Adjustable reach lever to dial in the perfect feel
Shimano's SM-RT66 6-bolt disc brake rotors deliver consistent stopping power in all riding conditions. The disc brake rotor's reliable anti-loosen plate construction makes for quick and secure installation.