The hubs are cnc machined in barnoldswick england from a single forged billet of 2014 t6 aluminium with a 7075 aluminium cassette body and pawl carrier four pawls engage into a new 40 tooth steel ratchet ring which is fixed into the hub shell and is sealed with a frictionless non contact labyrinth seal the axle runs on five cartridge bearings all pro 2 hubs are standard 6 bolt disc compatible the hub now runs stainless steel bearings throughout and brings them inline with mono rs hub this