Rims: WTB DX18 26'' (ETRTO 559), inner width: 18 mm Anodized black finish CNC machined sidewalls Stainless steel eyelets Rim wear indicator Pinned joint Drilled for Schrader valve 36 holesFront hub: Shimano HB-M475 (Black) 9x100mm 6-Bolt Disc Mount Adjutable Cup & Cone Contact sealed hub Quick Release Binder includedRear hub: Shimano FH-M475 (Black) 10x135mm 6-Bolt Disc Mount Adjutable Cup & Cone Contact sealed hub and freehub body Quick Release Binder included Compatible with 8,9,10 speed (MTB 11 speed requires 1.85mm spacer, not included)Assembled in North America by experienced wheelbuilders using Sapim 14G Stainless Steel spokes (Black) and 14mm Brass Polyax Nipples (Black) Attributes Axle Type QR Depth 18mm Rim Color Black Rim Construction Double wall Rim Drilling 36 Rim External Width 23.5mm Rim inner width range 0-21.9mm Rim Internal Width 19mm Rim Material Aluminum Rim Model WTB DX18 Skewers Included Yes Spoke Type Sapim Valve Schrader Wheel Diameter/ISO 26'' / 559 Wheel Tire Type Clincher Wheel-Brake Comp. Rim and Disc IS 6-bolt Freehub Body Shimano HG