The all new Pro2 range of hubs include a further development of our proven ratchet mechanism. This features a one piece 7075 aluminium rotor body and pawl carrier. Four pawls engage into a twenty-four tooth steel ratchet which is fixed into the hub shell and is sealed with a frictionless, non contact labyrinth seal. The axle runs on four cartridge bearings. The hub shell is machined from a solid billet of 2014 T6 aluminium.