SHIMANO XTR BR-M9110 FLAT MOUNT DISC BRAKE CALIPERTIME TO STOPStopping and slowing down is just as important as accelerating and going fast. It's no fun descending down a hill out of control. The Shimano XTR BR-M9110 Flat Mount Disc Brake Caliper features a clean and compact design that delivers performance and reliable stopping power in all conditions. The 2-piston caliper is compatible with 140/160 disc brake rotor sizes. FeaturesSame braking power as a post-mount 2-piston caliperClean and compact design that delivers performance and reliable stopping power in all conditionsCompatible disc brake rotor sizes: 140 and 160mm rotors | Shimano | XTR BR-M9110 Flat Mount Disc Brake Caliper Rear, K04TI Pads