This wheelset is made from aluminum alloy, with high strength and super lightweight. It is a great refitting choice for your mountain bike. Carbon hub makes it stronger and lighter. Front: 2 bearings; Rear: 5 bearings, provide super smooth riding. Fit for 27.5 mountain bikes. Specifications: Hub Material: Carbon fiber Spoke Material: Steel Holes: 24 Bearings: Front 2, Rear 5 Axle: Front 100mm, Rear 135mm Weight: Front 823g, Rear 925g Package Size: 74 63 18cm Package Weight: 3000g Package List: 1 Front Wheelset 1 Rear Wheelset. This item is in the category "Sporting Goods\Cycling\Bike Tyres, Tubes & Wheels\Wheels & Wheelsets". The seller is "ainaten" and is located in this country: GB. This item can be shipped to United Kingdom.