A good value disc compatible rear hubstandard six bolt disc rotor fitting ideal for deore hydraulic and mechanical disc brake systemslow maintenance design includes single contact seals to keep out mud and waterlow friction borozon treatment bearing surfaces for smooth action and long bearing lifelight alloy quick release included8 and 9 speed compatibleanodised aluminium hub shellavailable in 32 and 36 hole drillingsaverage weight 449 grams without qr