ElpiAuto235/85R16 vs 265/75R16
265/75R16 is 0.08″ (2 mm) shorter than 235/85R16, a 0.2% difference in overall diameter — comfortably inside the ±3% band most fitment guides use, so it swaps straight across for gearing and the speedometer.
| Measurement | 235/85R16 | 265/75R16 | Difference | % |
|---|---|---|---|---|
| Overall diameter | 31.73″ | 31.65″ | −0.08″ | −0.2% |
| Section width | 9.25″ | 10.43″ | +1.18″ | +12.8% |
| Sidewall height | 7.86″ | 7.82″ | −0.04″ | −0.5% |
| Circumference | 99.68″ | 99.43″ | −0.25″ | −0.2% |
| Revs per mile | 635.6 | 637.2 | +1.6 | +0.2% |
| Revs per km | 395.0 | 396.0 | +1.0 | +0.2% |
Speedometer: with 235/85R16 as the original, 265/75R16 makes an indicated 60 mph really about 59.9 mph, and the axle sits ~0.04″ lower.
Reading this comparison
The overall diameter is what matters here: 235/85R16 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.