285/70R22 vs 265/75R22
Going from one to the other changes the overall height by -0.2 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 285/70R22 | 265/75R22 | Change |
|---|---|---|---|
| Overall height | 37.7" | 37.6" | -0.2 % |
| Sidewall | 7.85" | 7.82" | -0.4 % |
| Section width | 285 mm | 265 mm | -7.0 % |
| Circumference | 118.5" | 118.3" | -0.2 % |
| Revs per mile | 535 | 536 | +0.2 % |
| Axle height | 18.85" | 18.82" | -0.8 mm |
| Approved rim width | 8–10.5" | 7.5–9.5" | overlap 8–9.5" |
Both are approved on a rim 8" to 9.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 285/70R22. Fit 265/75R22 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.0 mph | -0.0 |
| 50 mph | 49.9 mph | -0.1 |
| 70 mph | 69.9 mph | -0.1 |
| 90 mph | 89.9 mph | -0.1 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,984 on the road, so it over-counts by 16. At a true 70 mph the first turns 624 times a minute, the second 625.
What drivers reported
Nobody has filed a complaint naming 285/70R22. 265/75R22 carries 1.