DIMENSIONWheel Diameter 11.8″(300mm), axle head length 2.18″(2 3/16″)(55mm), bearing hole 0.47″(5/16″)(12mm). Please check the dimensions marked on the picture, if it meets the above three sizes, it can be installed. ONLY suitable for Manual Wheelchairs. (Other dimensions: screw length 4″, tire width 1.73″)