265/35R22 vs 285/30R22
Going from one to the other changes the overall height by -1.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 265/35R22 | 285/30R22 | Change |
|---|---|---|---|
| Overall height | 29.3" | 28.7" | -1.9 % |
| Sidewall | 3.65" | 3.37" | -7.8 % |
| Section width | 265 mm | 285 mm | +7.5 % |
| Circumference | 92.1" | 90.3" | -1.9 % |
| Revs per mile | 688 | 702 | +1.9 % |
| Axle height | 14.65" | 14.37" | -7.3 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 265/35R22. Fit 285/30R22 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.4 mph | -0.6 |
| 50 mph | 49.0 mph | -1.0 |
| 70 mph | 68.6 mph | -1.4 |
| 90 mph | 88.2 mph | -1.8 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,805 on the road, so it over-counts by 195. At a true 70 mph the first turns 803 times a minute, the second 819.
What drivers reported
265/35R22 carries 8 complaints. Nobody has filed one naming 285/30R22.