Shimano XT BR-M8110 Disc Brake Caliper - 2-Piston Rear Only Flat-Mount Metal Pads Fins Gray Model=Headset Bearing 1mm Rim inner width range

1mm Rim inner width range 28-34

Made of 5 mm perforated Airprene 1/4 inch foam inserts injection molded plastic inserts and a 2 mm Powertex crash panel for superior protection

Diameter 29in Brand DT Swiss Model U 533 ISO 622 ID Width 22 Width OD 28 Profile 20

If you have a BB30 crankset (30mm diameter aluminum spindle) this measurement will determine whether it is a long or short spindle:

Shimano XT BR-M8110 Disc Brake Caliper - 2-Piston Rear Only Flat-Mount Metal Pads Fins Gray Model=Headset Bearing 1mm Rim inner width rangeDeore XT BR M8100 series disc brake calipers offer consistent braking performance and reliable stopping power in all conditions. Rotor Included No Brake Caliper Type Flat Mount Hydraulic Fluid Type Mineral Oil Pad Compound Metallic Weight 417 Brake Position Rear Defined Color Gray Model Number BR M8110 Piston Count 2 Piston Mount Type Flat Mount Color Gray