TheShimano HB-475 Disc Front Hub is a god value disc-compatible front hub that has a standard six-bolt disc rotor fitting, ideal for Shimano hydraulic or mechanical disc brake systems. Shimano HB-475 Disc Front Hub Faetures Rubber contact seals help prevent rust-causing water and mud reaching hub bearings Light alloy quick release included Available in 32 and 36 hole drillings