Uh, why 1:3? European cars are generally about 4x lighter than European TIRs. If the proportions are similar in the US, you should be asking about 1:64 if the c

Uh, why 1:3? European cars are generally about 4x lighter than European TIRs. If the proportions are similar in the US, you should be asking about 1:64 if the cube is right, or 1:256 if the fourth power is. Edit: also, there's the duration of use per day. Typically about 1h for cars and 10h for trucks here, so you should be asking about 1:2560.