275/50R16 vs 295/50R16
Going from one to the other changes the overall height by +2.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 275/50R16 | 295/50R16 | Change |
|---|---|---|---|
| Overall height | 26.8" | 27.6" | +2.9 % |
| Sidewall | 5.41" | 5.81" | +7.3 % |
| Section width | 275 mm | 295 mm | +7.3 % |
| Circumference | 84.3" | 86.8" | +2.9 % |
| Revs per mile | 752 | 730 | -2.9 % |
| Axle height | 13.41" | 13.81" | +10.0 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 275/50R16. Fit 295/50R16 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 30.9 mph | +0.9 |
| 50 mph | 51.5 mph | +1.5 |
| 70 mph | 72.1 mph | +2.1 |
| 90 mph | 92.6 mph | +2.6 |
The odometer drifts with it. Ten thousand miles on the dial are really 10,294 on the road, so it under-counts by 294. At a true 70 mph the first turns 877 times a minute, the second 852.