Don't throw your your money away on this scale. This is a 10,000# scale and has 4 weigh bars. That means that each weigh bar is 2500#s, and you are going to roll a 4000# tire onto each platform. A 60 ton truck scale will have 8 30,000# weigh bars on them because each weigh bar has to handle the "local load". These are built to set pallets on and the frame will not hold up to the spot loads that you would put on it.