Pro4 6 bolt disc hub - 148x12mmShimano FreehubEnduro rim - Triple cavity construction offers excellent strength, yet keeps the weight low Tubeless compatible (requires tape and valves), 23mm internal & 28mm external width Welded and eyeleted 6061 T6 aluminium rimBlack Sapim spokes with silver brass nipples Wheels machine built and hand finished in Barnoldswick 27.5" Rim Diameter148 x 12 Boost axle spacing