Gravel, 28", UST Tubeless and Tube Type, Center Lock disc brake mount, thru axle, quick release compatible, ISM4D rim, rim height 21 mm, rim inner width 25 mm, 622 x 22 TSS Road, for tire width from 30 mm - 64 mm Included: UST valve with accessories, instruction manual Axle Thru axle 12 mm Mounting Rear wheel Type Item Brake system for disc brake, Center Lock Area of use Road Rim type Tubeless Freewheel body HG Main color black Wheel size 28 " Shifting system 8-speed , 9-speed , 10-speed , 11-speed