33x12.50R18 vs 33x12.50R17
33x12.50R17 is a safe swap for 33x12.50R18 by the usual ±3% rule: the diameter differs by 0.00%.
Side by side
| 33x12.50R18 | 33x12.50R17 | Difference | |
|---|---|---|---|
| Overall diameter | 33.00" | 33.00" | 0.00" (0.00%) |
| Section width | 318 mm | 318 mm | 0 mm |
| Sidewall | 7.50" | 8.00" | +0.50" |
| Rim | 18" | 17" | -1" |
| Circumference | 103.7" | 103.7" | 0.0" |
| Revs per mile | 611 | 611 | 0 |
| Ride height | — | — | 0.00" |
| Speedometer reads 60 mph | 60.0 | 60.0 | 0.0 mph |
Speedometer and odometer
With 33x12.50R17 on a car calibrated for 33x12.50R18, the speedometer reads 60.0 mph when you're really doing 60, and the odometer over-counts by 0.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.0 mph |
| 45 mph | 45.0 mph |
| 60 mph | 60.0 mph |
| 70 mph | 70.0 mph |
| 80 mph | 80.0 mph |
Other sizes close to 33x12.50R18
- 33x12.50R18 vs 275/65R18-2.80%
- 33x12.50R18 vs 275/70R18+0.48%
- 33x12.50R18 vs 285/70R17-0.88%
- 33x12.50R18 vs 265/65R18-4.35%
- 33x12.50R18 vs 265/70R18-1.19%
- 33x12.50R18 vs 255/70R18-2.86%
- 33x12.50R18 vs 285/65R18-1.25%
- 33x12.50R18 vs 295/70R18+3.82%
- 33x12.50R18 vs 295/70R17+0.79%
- 33x12.50R18 vs 285/60R18-4.65%
- 33x12.50R18 vs 325/65R18+4.95%
- 33x12.50R18 vs 255/80R17+0.19%
Questions
Can I replace 33x12.50R18 with 33x12.50R17?
33x12.50R17 is a safe swap for 33x12.50R18 by the usual ±3% rule: the diameter differs by 0.00%.
What's the difference between 33x12.50R18 and 33x12.50R17?
33x12.50R17 is 0.00" taller and 0 mm wider; the sidewall is +0.50". At an indicated 60 mph you'd actually be doing 60.0 mph.
Will 33x12.50R17 fit on 33x12.50R18 wheels?
No — 33x12.50R18 needs a 18" wheel and 33x12.50R17 a 17" wheel. This is a plus/minus-size swap that changes wheels too.