ElpiAuto275/65R18 vs 295/65R18
295/65R18 is 1.02″ (26 mm) taller than 275/65R18, a 3.2% difference in overall diameter — outside the ±3% band, so expect the speedometer to drift and check for rubbing before fitting.
| Measurement | 275/65R18 | 295/65R18 | Difference | % |
|---|---|---|---|---|
| Overall diameter | 32.07″ | 33.10″ | +1.02″ | +3.2% |
| Section width | 10.83″ | 11.61″ | +0.79″ | +7.3% |
| Sidewall height | 7.04″ | 7.55″ | +0.51″ | +7.3% |
| Circumference | 100.77″ | 103.98″ | +3.22″ | +3.2% |
| Revs per mile | 628.8 | 609.3 | −19.4 | −3.1% |
| Revs per km | 390.7 | 378.6 | −12.1 | −3.1% |
Speedometer: with 275/65R18 as the original, 295/65R18 makes an indicated 60 mph really about 61.9 mph, and the axle sits ~0.51″ higher.
Reading this comparison
The overall diameter is what matters here: 295/65R18 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.