Halo spin doctor pro solid rear axle kitthe axles and freehubs are interchangeable between all the spin doctor pro rear hub models this interchangeability allows customisation of the spin doctor pro hubs to suit your needs although they are not cross compatible with the original spin doctor parts rear axle m10 x 135 x 185mm with bearing covers and axle nuts features rear axle m10 x 135 x 185mm with bearing covers and axle nuts weight 140gbuyhalo wheels tyresfrom chain reaction cycles