Shimano Deore M525 6-Bolt Rear Hub is a good value disc-compatible rear hub with standard six-bolt Disc rotor fitting – ideal for Deore hydraulic and mechanical Disc brake systems. Anodised aluminium hub shell. Low maintenance design includes single contact seals to keep out mud and water, Low-friction Borozon treatment bearing surfaces for smooth action and long bearing life. Light alloy quick release included. 8 and 9 speed compatible, available in 32 and 36 hole drillings. Average weight 449 grams (without Q/R).