295/75R22.5 vs 275/80R22.5
Going from one to the other changes the overall height by -0.2 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 295/75R22.5 | 275/80R22.5 | Change |
|---|---|---|---|
| Overall height | 39.9" | 39.8" | -0.2 % |
| Sidewall | 8.71" | 8.66" | -0.6 % |
| Section width | 295 mm | 275 mm | -6.8 % |
| Circumference | 125.4" | 125.1" | -0.2 % |
| Revs per mile | 505 | 506 | +0.2 % |
| Axle height | 19.96" | 19.91" | -1.3 mm |
| Approved rim width | 8.5–11" | 7.5–10" | 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 295/75R22.5. Fit 275/80R22.5 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.9 mph | -0.1 |
| 50 mph | 49.9 mph | -0.1 |
| 70 mph | 69.8 mph | -0.2 |
| 90 mph | 89.8 mph | -0.2 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,975 on the road, so it over-counts by 25. At a true 70 mph the first turns 589 times a minute, the second 591.
What drivers reported
295/75R22.5 carries 16 complaints. 275/80R22.5 carries 2.