33x12.50R17 vs 305/70R17
305/70R17 is a safe swap for 33x12.50R17 by the usual ±3% rule: the diameter differs by +2.46%.
Side by side
| 33x12.50R17 | 305/70R17 | Difference | |
|---|---|---|---|
| Overall diameter | 33.00" | 33.81" | +0.81" (+2.46%) |
| Section width | 318 mm | 305 mm | -13 mm |
| Sidewall | 8.00" | 8.41" | +0.41" |
| Rim | 17" | 17" | same |
| Circumference | 103.7" | 106.2" | +2.5" |
| Revs per mile | 611 | 596 | -15 |
| Ride height | — | — | +0.41" |
| Speedometer reads 60 mph | 60.0 | 61.5 | +1.5 mph |
Speedometer and odometer
With 305/70R17 on a car calibrated for 33x12.50R17, the speedometer reads 58.6 mph when you're really doing 60, and the odometer under-counts by 2.5%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.7 mph |
| 45 mph | 46.1 mph |
| 60 mph | 61.5 mph |
| 70 mph | 71.7 mph |
| 80 mph | 82.0 mph |
Other sizes close to 33x12.50R17
- 33x12.50R17 vs 265/70R17-4.22%
- 33x12.50R17 vs 275/70R18+0.48%
- 33x12.50R17 vs 285/70R17-0.88%
- 33x12.50R17 vs 245/75R17-4.64%
- 33x12.50R17 vs 235/80R17-3.63%
- 33x12.50R17 vs 285/75R16-0.51%
- 33x12.50R17 vs 315/70R17+4.13%
- 33x12.50R17 vs 255/75R17-2.85%
- 33x12.50R17 vs 295/70R17+0.79%
- 33x12.50R17 vs 33x12.50R180.00%
- 33x12.50R17 vs 305/70R16-0.57%
- 33x12.50R17 vs 285/75R17+2.52%
Questions
Can I replace 33x12.50R17 with 305/70R17?
305/70R17 is a safe swap for 33x12.50R17 by the usual ±3% rule: the diameter differs by +2.46%.
What's the difference between 33x12.50R17 and 305/70R17?
305/70R17 is 0.81" taller and 13 mm narrower; the sidewall is +0.41". At an indicated 60 mph you'd actually be doing 61.5 mph.
Will 305/70R17 fit on 33x12.50R17 wheels?
Both use a 17" rim, so the wheel diameter matches; check the wheel's width range for a 305 mm tire and the fender clearance.