275 enduro pro4 boost mtb rear wheel 12x148 built with pro 4 hubs with standard spokes wheels machine built and hand finished in barnoldswick triple cavity construction offers excellent strength yet keeps the weight low tubeless compatible requires tape and valves shimano sram xd and hope freehub body options available for rear wheel specifications rim 23mm internal 28mm external width welded and eyeleted 6061 t6 aluminium rim boost specific 148x12mm hub 32 hole 4 pawl ratchet mechanism