285/70R17 vs 295/65R17
Going from one to the other changes the overall height by -1.9 %. That is inside the 3% band, so it fits and the speedometer stays close.
Side by side
| Measure | 285/70R17 | 295/65R17 | Change |
|---|---|---|---|
| Overall height | 32.7" | 32.1" | -1.9 % |
| Sidewall | 7.85" | 7.55" | -3.9 % |
| Section width | 285 mm | 295 mm | +3.5 % |
| Circumference | 102.8" | 100.8" | -1.9 % |
| Revs per mile | 617 | 628 | +1.9 % |
| Axle height | 16.35" | 16.05" | -7.8 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 285/70R17. Fit 295/65R17 and the needle stops telling the truth.
| Needle says | You are doing | Out by |
|---|---|---|
| 30 mph | 29.4 mph | -0.6 |
| 50 mph | 49.1 mph | -0.9 |
| 70 mph | 68.7 mph | -1.3 |
| 90 mph | 88.3 mph | -1.7 |
The odometer drifts with it. Ten thousand miles on the dial are really 9,813 on the road, so it over-counts by 187. At a true 70 mph the first turns 719 times a minute, the second 733.
What drivers reported
285/70R17 carries 4 complaints. Nobody has filed one naming 295/65R17.