1.Alloy bike hub with Quick Release 2.new design for whole shell 3.suitable for MTB, BMX, Road, Show bikes 2.new ... design for whole shell3.suitable for MTB, BMX, Road, Show bikesProduct NameAlloy Bicycle Hub(with quick release)Item No ... )Φ38, (R)Φ44Quick ReleaseYesColorSilver, Red, Yellow, Blue, Black, PurpleSuitableMTB, BMX, Road, Show etc bikes