Thats 3 " in 10 " out being its a 12 " wheel is actually 13 " wide outside to outside. They would work on a smooth drag strip but the stress of a turn or a bump on a street car? I myself would be leery with 10 "s of leverage on the wheel center depending on the wheel and its use. I hope they are not Draglites and your using them on the street with that much offset .