Free tools to check wheel offset, backspacing, and tire sizing before you bolt anything to your truck or SUV.
Running new wheels or going up a tire size? These calculators show you how offset, backspacing, wheel width, diameter, and tire size change your fitment, so you know whether it will poke, tuck, or rub before you spend a dime. Punch in your current setup, compare it to what you want, and see the difference.

See how wheel offset, width, diameter, and tire size change your fitment, with metric and standard readouts side by side. Check whether an aggressive offset clears your fenders and see how a new setup stacks up against stock, side by side and in real time. Want to run a stretched setup? We can show that too.
Launch Calculator