275/45R22 vs 33x12.50R22
33x12.50R22 is outside the ±3% rule as a replacement for 275/45R22: the diameter differs by +3.96%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Side by side
| 275/45R22 | 33x12.50R22 | Difference | |
|---|---|---|---|
| Overall diameter | 31.74" | 33.00" | +1.26" (+3.96%) |
| Section width | 275 mm | 318 mm | +43 mm |
| Sidewall | 4.87" | 5.50" | +0.63" |
| Rim | 22" | 22" | same |
| Circumference | 99.7" | 103.7" | +3.9" |
| Revs per mile | 635 | 611 | -24 |
| Ride height | — | — | +0.63" |
| Speedometer reads 60 mph | 60.0 | 62.4 | +2.4 mph |
Speedometer and odometer
With 33x12.50R22 on a car calibrated for 275/45R22, the speedometer reads 57.7 mph when you're really doing 60, and the odometer under-counts by 4.0%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.2 mph |
| 45 mph | 46.8 mph |
| 60 mph | 62.4 mph |
| 70 mph | 72.8 mph |
| 80 mph | 83.2 mph |
Other sizes close to 275/45R22
- 275/45R22 vs 285/45R22+1.12%
- 275/45R22 vs 275/50R22+3.41%
- 275/45R22 vs 275/40R22-3.41%
- 275/45R22 vs 265/40R22-4.40%
- 275/45R22 vs 285/40R22-2.42%
- 275/45R22 vs 305/45R22+3.35%
- 275/45R22 vs 305/40R22-0.43%
- 275/45R22 vs 325/35R22-2.48%
- 275/45R22 vs 315/35R22-3.35%
- 275/45R22 vs 295/40R22-1.43%
- 275/45R22 vs 285/50R22+4.65%
- 275/45R22 vs 285/40R23+0.73%
Questions
Can I replace 275/45R22 with 33x12.50R22?
33x12.50R22 is outside the ±3% rule as a replacement for 275/45R22: the diameter differs by +3.96%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 275/45R22 and 33x12.50R22?
33x12.50R22 is 1.26" taller and 43 mm wider; the sidewall is +0.63". At an indicated 60 mph you'd actually be doing 62.4 mph.
Will 33x12.50R22 fit on 275/45R22 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.