Will These Wheels Fit?
Will these wheels fit your vehicle without rubbing? Compare your
current wheel-and-tire setup to the one you want.
Accepts metric (285/70R17) and truck flotation sizes
(33x12.50R17). Add your measured clearance for a fits / tight / rub verdict.
Current setup
New setup
Measure two gaps for a fits / tight / rub verdict
Optional — leave blank to just see the numbers. Measure at the closest point with the wheels straight, on level ground.Shop this setup (affiliate links)
Affiliate links: CheckFitment may earn a commission if you buy through them, at no extra cost to you. Check bolt pattern and center bore on your vehicle page first.
What this calculates
- Fender side: how far the outermost edge (tire or wheel lip, whichever sticks out more) moves toward the fender. Offset change plus half the tire-width change.
- Suspension side: how far the innermost edge moves toward the strut, control arm or frame. This is the rub most people miss.
- Diameter and speedometer: a taller tire raises the vehicle by half the diameter change and makes the speedometer read low by the same percentage the diameter grew.
- Backspacing: mounting face to inner wheel lip, for caliper clearance and what off-road shops quote.
Reading tire sizes
265/70R17: 265 mm section width, sidewall 70% of that (185.5 mm), 17-inch rim. Overall diameter = rim + two sidewalls = 802.8 mm (31.6"). 33x12.50R17: 33-inch diameter, 12.5-inch width, 17-inch rim — the flotation format used on most lifted trucks. The tool converts both.
Common gotchas with a new wheel and tire size
- Nominal section width is measured on a specific rim width; each extra half-inch of rim adds roughly 5 mm of tire width. Treat width results as ±5 mm.
- A wider tire on the same wheel grows equally both ways — it eats inner clearance too, not just poke.
- Spacers move the whole assembly out: a 25 mm spacer equals 25 mm less offset.
- Going up more than ~3% in diameter usually calls for a speedometer recalibration and can affect ABS and transmission shift points.
Wheel fitment FAQ
How do I know if new wheels will rub?
Measure your current tire's gap to the fender lip and to the nearest suspension part, then enter both. The tool subtracts how far each edge moves: under 10 mm left is tight, below zero rubs.
How far does a lower offset push the tire out?
Millimeter for millimeter, plus half of any tire width change. The default example (7.5" ET44 with 265/70R17 to 9" ET18 with 285/70R17) moves the fender-side edge out 36 mm and the suspension-side edge 16 mm away.
Does a bigger tire change my speedometer?
Yes. It reads low by the percentage the diameter grew. In the default example the tire grows 3.5%, so the speedometer shows 58.0 mph at a true 60.
Wheel-only offset comparison → · Compare three wheels side by side → · Plus sizing: tire sizes for bigger wheels → · Bolt pattern converter →