ElpiAuto285/75R17 vs 295/70R17
295/70R17 is 0.57″ (14 mm) shorter than 285/75R17, a 1.7% difference in overall diameter — right at the edge of the ±3% band — fine on most cars, but check clearance at full lock and full suspension compression.
| Measurement | 285/75R17 | 295/70R17 | Difference | % |
|---|---|---|---|---|
| Overall diameter | 33.83″ | 33.26″ | −0.57″ | −1.7% |
| Section width | 11.22″ | 11.61″ | +0.39″ | +3.5% |
| Sidewall height | 8.42″ | 8.13″ | −0.29″ | −3.4% |
| Circumference | 106.28″ | 104.49″ | −1.79″ | −1.7% |
| Revs per mile | 596.1 | 606.4 | +10.2 | +1.7% |
| Revs per km | 370.4 | 376.8 | +6.4 | +1.7% |
Speedometer: with 285/75R17 as the original, 295/70R17 makes an indicated 60 mph really about 59.0 mph, and the axle sits ~0.29″ lower.
Reading this comparison
The overall diameter is what matters here: 285/75R17 is the taller tire. It sets ride height, gearing and how far the tire travels per revolution — which is what the speedometer and odometer count. Width and sidewall change fit and feel (a wider tire needs a wider wheel and more clearance; a shorter sidewall sharpens steering) but not the gearing.
Figures are geometric estimates from the size codes; real moulded tires vary by brand by 1–3%. Confirm load rating, wheel width and physical clearance on your vehicle before fitting. To compare any other two sizes, use the tire size comparison tool; to decode one size and see what else fits its wheel, the tire size calculator.