Shimano Nexus SG-3D55 3-Speed Internally Geared Disc Brake 32h Rear Hub Kit Small Parts IncludedShimano Nexus SG 3D55 3 Speed Internally Geared Disc Brake 32h Rear Hub Kit Small Parts Included. Shimano Nexus SG 3D55 3 Speed Disc Brake Internally Geared HubsIncludes 19 tooth cog push rod hub nuts dust cap and non turn washer Centerlock disc brake rotor mount rotor not included 3 speeds with a 186% gear range: 1st gear = 0. 733 2nd gear = 1. 00 (direct drive) 3rd gear = 1. 36 3 speed Nexus Shifter not included Must order Shifter (LD0777) and Bell