The Profile Elite Disc Cassette Hub was designed to be the best racing hubs available. Features: 6 pawl driver for 204 points of engagement means instant forward motion at the first application of pedal pressure ISO Disc Brake Black anodized Volcano cones and aluminum cone spacers with hardened CrMo knurls to bite into dropouts Aluminum threaded axle only Bolt choices for 3/8″ threaded aluminum axle: -Standard 3/8 socket head bolts(8mm hex)- come with anodized Volcano cones -17mm Hex Head outer w/8mm internal hex -Button Head w/8mm internal hex CrMo or Ti one-piece drivers Aluminum or Titanium splined drivers for Profile Cogs Standard CrMo Cogs, or upgrade to Aluminum or Elite CrMo Cogs 36h RHD only Standard BMX 110mm hub width Disc rotor not included Colour: Black, Polished