The Shimano Deore XT XC M8000 27.5in 12x148mm Boost Rear Wheels are XC wheels, designed to be lightweight, strong and durable with a 20C (23.9 mm external) UST Tubeless and tubed tyre compatible rim for use with 1.9 - 2.25 inch tyres. The hub uses angular contact bearings designed to give both radial and lateral support; they also offer precision bearing adjustment and easy maintenance. Shimano Deore XT XC M8000 27.5in 12x148mm Boost Rear Wheel Features 28 butted 2.0-1.5-2.0 mm stainless steel spokes Quick engaging Freehub body with pawl engagement every 10 degree giving near instant power transfer Ball bearing races are ground with Cubic Boron Nitride tool for high precision Wide bearing placement gives excellent lateral rigidity further improving strength and durability Forged then anodized alloy hub shell for maximum strength and long lasting good looks Easy to use Centre-Lock Disc Rotor mount Double contact seals help keep the elements out and the grease in Shimano Deore XT XC M8000 27.5in 12x148mm Boost Rear Wheel Specifications For Boost 148x12mm dropouts (axle not included) For use with 8, 9, 10 and 11-speed MTB cassette sprockets Brake Type: Disc Colour: Black Discipline: MTB Rim Type: Clincher Wheel Diameter: 27.5 inches Product Type: Rear Wheels