275/60R22 vs 295/55R22
Going from one to the other changes the overall height by -0.6 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 275/60R22 | 295/55R22 | Change |
|---|---|---|---|
| Overall height | 35.0" | 34.8" | -0.6 % |
| Sidewall | 6.50" | 6.39" | -1.7 % |
| Section width | 275 mm | 295 mm | +7.3 % |
| Circumference | 109.9" | 109.3" | -0.6 % |
| Revs per mile | 576 | 580 | +0.6 % |
| Axle height | 17.50" | 17.39" | -2.8 mm |
| Approved rim width | 7.5–10" | 8.5–11" | overlap 8.5–10" |
Both are approved on a rim 8.5" to 10" wide. If yours is in that band, this is a tire change and nothing else.
What the speedometer will say
Calibrated for 275/60R22. Fit 295/55R22 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.8 mph | -0.2 |
| 50 mph | 49.7 mph | -0.3 |
| 70 mph | 69.6 mph | -0.4 |
| 90 mph | 89.4 mph | -0.6 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,938 on the road, so it over-counts by 62. At a true 70 mph the first turns 672 times a minute, the second 677.