3 pawl, 30 point pick-up system for super fast drive response. Four sealed cartridge bearings with a forged, CNC machined 6061 aluminum shell, 8/9sp HG compatible. International Standard 6-bolt disc rotor mount . 3 models: XC alloy freehub and quick release, MTB CrMo freehub and quick release, DH CrMo freehub and 10mm bolt-on axle. All Spin Doctor Pro axles and freehubs are interchangeable (but are not cross compatible with the original Spin Doctor hubs). 14mm axle adapters are available separately to fit 10mm bolt-on axle models, use BTI part number HL-3156. Spin Doctor Pro rear hubs are used on SAS, Tornado and Freedom wheelsets see BTI wheels
