265/75R22 vs 285/65R22
Going from one to the other changes the overall height by -2.8 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 265/75R22 | 285/65R22 | Change |
|---|---|---|---|
| Overall height | 37.6" | 36.6" | -2.8 % |
| Sidewall | 7.82" | 7.29" | -6.8 % |
| Section width | 265 mm | 285 mm | +7.5 % |
| Circumference | 118.3" | 114.9" | -2.8 % |
| Revs per mile | 536 | 551 | +2.8 % |
| Axle height | 18.82" | 18.29" | -13.5 mm |
| Approved rim width | 7.5–9.5" | 8–10.5" | 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 265/75R22. Fit 285/65R22 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.2 mph | -0.8 |
| 50 mph | 48.6 mph | -1.4 |
| 70 mph | 68.0 mph | -2.0 |
| 90 mph | 87.5 mph | -2.5 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,718 on the road, so it over-counts by 282. At a true 70 mph the first turns 625 times a minute, the second 643.
What drivers reported
265/75R22 carries 1 complaints. Nobody has filed one naming 285/65R22.