285/45R22 vs 33x12.50R22
33x12.50R22 is a safe swap for 285/45R22 by the usual ±3% rule: the diameter differs by +2.81%.
Side by side
| 285/45R22 | 33x12.50R22 | Difference | |
|---|---|---|---|
| Overall diameter | 32.10" | 33.00" | +0.90" (+2.81%) |
| Section width | 285 mm | 318 mm | +33 mm |
| Sidewall | 5.05" | 5.50" | +0.45" |
| Rim | 22" | 22" | same |
| Circumference | 100.8" | 103.7" | +2.8" |
| Revs per mile | 628 | 611 | -17 |
| Ride height | — | — | +0.45" |
| Speedometer reads 60 mph | 60.0 | 61.7 | +1.7 mph |
Speedometer and odometer
With 33x12.50R22 on a car calibrated for 285/45R22, the speedometer reads 58.4 mph when you're really doing 60, and the odometer under-counts by 2.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.8 mph |
| 45 mph | 46.3 mph |
| 60 mph | 61.7 mph |
| 70 mph | 72.0 mph |
| 80 mph | 82.2 mph |
Other sizes close to 285/45R22
- 285/45R22 vs 275/50R22+2.27%
- 285/45R22 vs 275/40R22-4.48%
- 285/45R22 vs 285/40R22-3.50%
- 285/45R22 vs 305/45R22+2.21%
- 285/45R22 vs 275/45R22-1.10%
- 285/45R22 vs 305/40R22-1.53%
- 285/45R22 vs 325/35R22-3.56%
- 285/45R22 vs 315/35R22-4.42%
- 285/45R22 vs 295/40R22-2.51%
- 285/45R22 vs 285/50R22+3.50%
- 285/45R22 vs 285/40R23-0.38%
- 285/45R22 vs 275/50R21-0.85%
Questions
Can I replace 285/45R22 with 33x12.50R22?
33x12.50R22 is a safe swap for 285/45R22 by the usual ±3% rule: the diameter differs by +2.81%.
What's the difference between 285/45R22 and 33x12.50R22?
33x12.50R22 is 0.90" taller and 33 mm wider; the sidewall is +0.45". At an indicated 60 mph you'd actually be doing 61.7 mph.
Will 33x12.50R22 fit on 285/45R22 wheels?
Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 318 mm tire and the fender clearance.