CompareWheels

235/75R17 vs 245/75R17

Side-by-side comparison of overall diameter, sidewall height, speedometer error, and ride-height change.

BorderlineCheck wheel-arch clearance and reset TPMS before fitting.

To scale

ground15.0 mm235/75R17784.3 mm245/75R17799.3 mm

235/75R17

Section width
235 mm
Aspect ratio
75%
Rim diameter
17"
Sidewall
176.3 mm
Overall diameter
784.3 mm
Circumference
2464 mm
Revs / mile
653
Revs / km
406

245/75R17

Section width
245 mm
Aspect ratio
75%
Rim diameter
17"
Sidewall
183.8 mm
Overall diameter
799.3 mm
Circumference
2511 mm
Revs / mile
641
Revs / km
398

Difference

Overall diameter
+15.0 mm (+1.91%)
Sidewall height
+7.5 mm
Tread width
+10 mm
Ride height (axle)
+7.5 mm
Speedometer error
+1.91%
At indicated 60 mph
actual 61.1 mph
At indicated 100 km/h
actual 101.9 km/h

Will 245/75R17 fit instead of 235/75R17?

The overall diameter changes by 1.91%. Most manufacturers consider a swap acceptable when the difference stays under 3% — beyond that, you may see speedometer error, ABS/TPMS warnings, or wheel-well clearance problems. This page only covers the math; your vehicle's wheel arches, suspension geometry, and load rating still matter.

What the numbers mean