Feature:1. Aluminum Alloy: Made of high quality aluminum alloy material, the rear disc hub has compact structure, high strength, wear resistance and corrosion resistance.2. CNC Process: Using CNC cutting technology, the rear hub has high accuracy, stable performance, and it can give full play to the maximum performance during use.3. Anode Technology: The hubs are all made of anode process, which can provide excellent anti corrosion effect, improve wear resistance, electrical conductivity, reflectivity and enhance aesthetics.4. Main Features: With 4 rear bearings and 32 holes, and the rear disc hub has specification of 135x12mm / 5.3x0.5in, it will certainly meet your needs.5. Perfect Accessories: Very perfect mountain bike accessories, the bicycle disc brake hub has strong practicability, high reliability and long service life.Specification:Item Type: Mountain Bike Rear HubMaterial: Aluminum AlloySpoke Hole: 32H/14GBearing: 4 Rear BearingsColor: As Pictures ShownWeight: Approx. 385g / 13.6ozRear Hub Size: Approx. 135x12mm / 5.3x0.5inStandard washer with a thickness of about 3mm, can support 9-12 speed flywheel after use.Package List:2 x Barrel Shaft End Cap1 x Rear Hub1 x Quick Release Skewer2 x Quick Release End Cap1 x Gasket