Key Features:Engineered, manufactured, and assembled in Portland, Oregon USA,Legendary made-in-house bearings,Easily serviceable with a 2.5mm hex and pick or pen knife,Completely re-buildable with our R45 Hub Service Tool,Available with Shiamano/Sram HG or Sram XDR driveshell,Available in 28h, and 32h,Ceramic bearing upgrade available.Specification:Axle Width: 130mm,Flange Diameter DS & NDS: 51mm,Center to Flange DS: 17mm,Center to Flange NDS: 34.3mm.