Fitment / Offset Calculator for new wheels
Fitment tools
Wheel offset calculator.
Compare your current wheels to a new setup. See how far the new wheel moves in toward your suspension and out toward your fender, plus how a new tire size changes your speedometer.
Offset is usually stamped on the back of the wheel as ET, for example ET35. Positive offset is the most common.
| Current | New | Change | |
|---|---|---|---|
| Wheel size | |||
| Backspacing | |||
| Front spacing | |||
| Tire diameter | |||
| Sidewall height | |||
| Revs per mile | |||
| Speedometer at 60 mph | 60.0 mph |
Add both tire sizes to compare diameter and speedometer.
How to read it
Inside clearance is how much closer (or farther) the inner edge of the new wheel gets to your brakes, struts and control arms. A negative number means the wheel moves in toward them.
Outside position is how much farther the outer lip sits toward your fender. A positive number means more poke and a more flush look.
Good to know
These numbers are estimates based on wheel width and offset. Brake caliper shape, spoke design and suspension setup also matter, so we always confirm fitment before a set is built.
Not sure what fits your car? Send us your year, make and model and we'll spec it for you.
Want us to check your fitment?
Call or text 818-210-8770 with your car and the wheel you like.