285/55R22 vs 295/55R22
Going from one to the other changes the overall height by +1.3 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 285/55R22 | 295/55R22 | Change |
|---|---|---|---|
| Overall height | 34.3" | 34.8" | +1.3 % |
| Sidewall | 6.17" | 6.39" | +3.5 % |
| Section width | 285 mm | 295 mm | +3.5 % |
| Circumference | 107.9" | 109.3" | +1.3 % |
| Revs per mile | 587 | 580 | -1.3 % |
| Axle height | 17.17" | 17.39" | +5.5 mm |
| Approved rim width | 8–10.5" | 8.5–11" | overlap 8.5–10.5" |
Both are approved on a rim 8.5" to 10.5" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 285/55R22. Fit 295/55R22 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.4 mph | +0.4 |
| 50 mph | 50.6 mph | +0.6 |
| 70 mph | 70.9 mph | +0.9 |
| 90 mph | 91.1 mph | +1.1 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,126 on the road, so it under-counts by 126. At a true 70 mph the first turns 685 times a minute, the second 677.