To suit HSP 1/10 scale models. Please check your manual for the correct part number to ensure a fit. Parts are plastic unless otherwise stated in the title. Images copyrighted by BlackSmith Products Ltd. 12mm hex hub - 56mm inner diameter (check the hub carrier is smaller than this) - 84mm outer diameter - 33mm wide - Edge of wheel to edge of12mm hex center is 17mm. Note: Wheels are not glued to the tyres.