CompareWheels

275/70R17 vs 285/70R17

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

ground14.0 mm275/70R17816.8 mm285/70R17830.8 mm

275/70R17

Section width
275 mm
Aspect ratio
70%
Rim diameter
17"
Sidewall
192.5 mm
Overall diameter
816.8 mm
Circumference
2566 mm
Revs / mile
627
Revs / km
390

285/70R17

Section width
285 mm
Aspect ratio
70%
Rim diameter
17"
Sidewall
199.5 mm
Overall diameter
830.8 mm
Circumference
2610 mm
Revs / mile
617
Revs / km
383

Difference

Overall diameter
+14.0 mm (+1.71%)
Sidewall height
+7.0 mm
Tread width
+10 mm
Ride height (axle)
+7.0 mm
Speedometer error
+1.71%
At indicated 60 mph
actual 61.0 mph
At indicated 100 km/h
actual 101.7 km/h

Will 285/70R17 fit instead of 275/70R17?

The overall diameter changes by 1.71%. 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