Shimano Deore 590 FH-M525 8/9/10-Speed Rear Freehub for Disc Brakes - Black - 36H FEATURES Conventional 6-bolt disc rotor mount Double contact sealing Super polished bearing races Ultra smooth bearing race surfaces provide a precision low-friction rolling action Quick release lever and adjusting nut are made from light alloy Cup & Cone Bearing Shimano Groupset: Deore 590 Model: FH-M525 Discipline: Mountain Bike OLD (Over Locknut Dimension): 135mm Axle: 146mm Spoke Holes: 36H Cassette Compatibility: Shimano/SRAM 8/9/10-Speed Brake Compatibility: 6-Bolt Disc brake Color/Finish: Black