The hub shell is cnc machined in barnoldswick england from a single forged billet of 2014 t6 aluminium and uses a 7075 aluminium cassette body both these are now machined to allow fitting of the new generation of 11 speed cassettes from shimano but still allow for use of 9 and 10 speed shimano and sram cassettes by means of a removable spacer hubs are also available to suit campagnolo 9 10 and 11 speed cassettes the hub is also fitted with our new 40 tooth ratchet with 4 pawl engagement g