265/70R17 vs 33x12.50R17
33x12.50R17 is outside the ±3% rule as a replacement for 265/70R17: the diameter differs by +4.41%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Side by side
| 265/70R17 | 33x12.50R17 | Difference | |
|---|---|---|---|
| Overall diameter | 31.61" | 33.00" | +1.39" (+4.41%) |
| Section width | 265 mm | 318 mm | +53 mm |
| Sidewall | 7.30" | 8.00" | +0.70" |
| Rim | 17" | 17" | same |
| Circumference | 99.3" | 103.7" | +4.4" |
| Revs per mile | 638 | 611 | -27 |
| Ride height | — | — | +0.70" |
| Speedometer reads 60 mph | 60.0 | 62.6 | +2.6 mph |
Speedometer and odometer
With 33x12.50R17 on a car calibrated for 265/70R17, the speedometer reads 57.5 mph when you're really doing 60, and the odometer under-counts by 4.4%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.3 mph |
| 45 mph | 47.0 mph |
| 60 mph | 62.6 mph |
| 70 mph | 73.1 mph |
| 80 mph | 83.5 mph |
Other sizes close to 265/70R17
- 265/70R17 vs 265/75R16+0.14%
- 265/70R17 vs 245/70R17-3.49%
- 265/70R17 vs 285/70R17+3.49%
- 265/70R17 vs 265/65R18-0.14%
- 265/70R17 vs 245/75R17-0.44%
- 265/70R17 vs 265/65R17-3.30%
- 265/70R17 vs 235/85R16+0.39%
- 265/70R17 vs 235/80R17+0.62%
- 265/70R17 vs 255/65R17-4.92%
- 265/70R17 vs 255/70R17-1.74%
- 265/70R17 vs 255/75R17+1.43%
- 265/70R17 vs 235/75R17-2.30%
Questions
Can I replace 265/70R17 with 33x12.50R17?
33x12.50R17 is outside the ±3% rule as a replacement for 265/70R17: the diameter differs by +4.41%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 265/70R17 and 33x12.50R17?
33x12.50R17 is 1.39" taller and 53 mm wider; the sidewall is +0.70". At an indicated 60 mph you'd actually be doing 62.6 mph.
Will 33x12.50R17 fit on 265/70R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 318 mm tire and the fender clearance.