Rims: Evo Tour 19 27.5"* ETRTO 584-19* Inner width: 19mm* 6061-T6 Alloy* Double Wall* Powder Coat satin black finish* CNC machined sidewalls* Drilled for Schrader valve* Rim or Disc Brake compatible* 36 holesFront hub:* QR 9x100mm (Quick Release binder included)* 6-Bolt ISO disc mount* 6061-T6 Alloy* Anodized black finish* Adjustable bearings* Rubber sealsRear hub:* QR 10x135mm (Quick Release binder included)* 6-Bolt ISO disc mount* 6061-T6 Alloy* Anodized black finish* Adjustable bearings* Rubber seals* HG freehub compatible with 8/9/10 speedAssembled in North America by experienced wheelbuilders with Sapim stainless steel spokes and 14mm Brass Polyax Nipples