1、Durable Material: Our bike disc hubs are made of premium aluminum alloy, which is strong, rust free and non deforming. They are durable and designed for long term use. 2、Low Friction: Our bike disc hubs are accurately machined, which has low friction and well sealed for effective isolation from water, mud and dirt. It bring you a great and fast riding experience. 3、Anodized Process: The bike disc hubs are anodized to provide excellent corrosion protection, improved abrasion resistance, electrical conductivity, reflectivity, and aesthetic enhancement. 4、CNC Cutting Process: Bike hubs adopts CNC cutting process, the exquisite CNC process makes our products high accuracy, stable quality and guaranteed quality. 5、Easy Installation: Bike hubs set is simple to install and easy to use. All you need to do is put it on your bike and you start to go. No other installation tools are required. Item Type: Bike Disc Hub Material: Aluminum Alloy Weight: Approx. 696g/24.55oz Size: Quick Release Skewer: Front: 100x9mm/3.94x0.35in Rear: 135x10mm/5.31x0.39in Color: Black Product Style: Quick Release Version Hole: 32H Front Sealing Bearing: 2, Rear Sealing Bearing: 4 2 x Disc Hub 2 x Quick Release Skewer