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 (-01): Alloy, Bolt-On, Solid CrMo axle 3/8'' x 100mm (L:140mm) Anodized black finish Adjustable bearings with rubber seal Flange Nuts includedRear hub (-02): Alloy, Freewheel, Bolt-On, Solid CrMo axle 3/8'' x 135mm (L:175mm) Anodized black finish Adjustable bearings with rubber seal Flange Nuts includedAssembled in North America by experienced wheelbuilders using Sapim 14G Stainless Steel spokes and 14mm Brass Polyax Nipples Attributes Axle Type Bolt-on 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 18mm Rim Material Aluminum Spoke Type Sapim Valve Schrader Wheel Diameter/ISO 26'' / 559 Wheel Tire Type Clincher Wheel-Brake Comp. Rim