Features1Made from aluminum alloy to ensure stiffness and durability. 2Sealed bearings protect the hub from dirt and water. 3Compatible with 9-13 speed freewheels. 4Quick release, caps, spacers are included, easy to install and remove.SpecificationFeatures:Made from aluminum alloy to ensure stiffness and durability.Sealed bearings protect the hub from dirt and water.Compatible with 9-13 speed freewheels.Quick release, caps, spacers are included, easy to install and remove.Specifications:Material: Aluminum alloyHoles/Spokes: 32H/14GBearing: Front 2, rear 4Front Hub: Quick Release: 100*9mm ; Axle: 100 * 15mmRear Hub: Quick Release: 135 * 10mm ; Axle: 135 * 12mm; 142 * 12mmFront Hub Weight: Approx. 137g / 4.8ozRear Hub Weight: Approx. 245g / 8.6ozQuick Release Weight: Approx. 114g / 4oz (1 pair)Package Size: Approx. 20.8 * 16 * 7.5cm / 8.2 * 6.3 * 3.0inPackage Weight: Approx. 656g / 1.4lbPackage List:1 * Front Hub1 * Rear Hub1 * Pair of Quick Release2 * Pair of Caps2 * Axle Cap1 * Spacer for Rear HubPackage List1 * Front Hub1 * Rear Hub1 * Pair of Quick Release2 * Pair of Caps2 * Axle Cap1 * Spacer for Rear Hub