ElpiAuto235/75R17 vs 265/75R17
265/75R17 is 1.77″ (45 mm) taller than 235/75R17, a 5.7% difference in overall diameter — outside the ±3% band, so expect the speedometer to drift and check for rubbing before fitting.
| Measurement | 235/75R17 | 265/75R17 | Difference | % |
|---|---|---|---|---|
| Overall diameter | 30.88″ | 32.65″ | +1.77″ | +5.7% |
| Section width | 9.25″ | 10.43″ | +1.18″ | +12.8% |
| Sidewall height | 6.94″ | 7.82″ | +0.89″ | +12.8% |
| Circumference | 97.01″ | 102.57″ | +5.57″ | +5.7% |
| Revs per mile | 653.2 | 617.7 | −35.4 | −5.4% |
| Revs per km | 405.9 | 383.8 | −22.0 | −5.4% |
Speedometer: with 235/75R17 as the original, 265/75R17 makes an indicated 60 mph really about 63.4 mph, and the axle sits ~0.89″ higher.
Reading this comparison
The overall diameter is what matters here: 265/75R17 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.