275/70R17 vs 33x12.50R17
33x12.50R17 is a safe swap for 275/70R17 by the usual ±3% rule: the diameter differs by +2.62%.
Side by side
| 275/70R17 | 33x12.50R17 | Difference | |
|---|---|---|---|
| Overall diameter | 32.16" | 33.00" | +0.84" (+2.62%) |
| Section width | 275 mm | 318 mm | +43 mm |
| Sidewall | 7.58" | 8.00" | +0.42" |
| Rim | 17" | 17" | same |
| Circumference | 101.0" | 103.7" | +2.6" |
| Revs per mile | 627 | 611 | -16 |
| Ride height | — | — | +0.42" |
| Speedometer reads 60 mph | 60.0 | 61.6 | +1.6 mph |
Speedometer and odometer
With 33x12.50R17 on a car calibrated for 275/70R17, the speedometer reads 58.5 mph when you're really doing 60, and the odometer under-counts by 2.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.8 mph |
| 45 mph | 46.2 mph |
| 60 mph | 61.6 mph |
| 70 mph | 71.8 mph |
| 80 mph | 82.1 mph |
Other sizes close to 275/70R17
- 275/70R17 vs 265/70R17-1.71%
- 275/70R17 vs 275/65R18-0.26%
- 275/70R17 vs 285/70R17+1.71%
- 275/70R17 vs 245/75R17-2.14%
- 275/70R17 vs 265/65R17-4.96%
- 275/70R17 vs 235/80R17-1.10%
- 275/70R17 vs 255/70R18-0.32%
- 275/70R17 vs 255/70R17-3.43%
- 275/70R17 vs 255/75R17-0.31%
- 275/70R17 vs 295/70R17+3.43%
- 275/70R17 vs 235/75R17-3.98%
- 275/70R17 vs 255/80R17+2.82%
Questions
Can I replace 275/70R17 with 33x12.50R17?
33x12.50R17 is a safe swap for 275/70R17 by the usual ±3% rule: the diameter differs by +2.62%.
What's the difference between 275/70R17 and 33x12.50R17?
33x12.50R17 is 0.84" taller and 43 mm wider; the sidewall is +0.42". At an indicated 60 mph you'd actually be doing 61.6 mph.
Will 33x12.50R17 fit on 275/70R17 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.