265/50R22 vs 285/45R22
Going from one to the other changes the overall height by -1.0 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 265/50R22 | 285/45R22 | Change |
|---|---|---|---|
| Overall height | 32.4" | 32.1" | -1.0 % |
| Sidewall | 5.22" | 5.05" | -3.2 % |
| Section width | 265 mm | 285 mm | +7.5 % |
| Circumference | 101.9" | 100.8" | -1.0 % |
| Revs per mile | 622 | 628 | +1.0 % |
| Axle height | 16.22" | 16.05" | -4.3 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 265/50R22. Fit 285/45R22 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.7 mph | -0.3 |
| 50 mph | 49.5 mph | -0.5 |
| 70 mph | 69.3 mph | -0.7 |
| 90 mph | 89.1 mph | -0.9 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,897 on the road, so it over-counts by 103. At a true 70 mph the first turns 725 times a minute, the second 733.
What drivers reported
Nobody has filed a complaint naming 265/50R22. 285/45R22 carries 6.