275/50R22 vs 33x12.50R22
33x12.50R22 is a safe swap for 275/50R22 by the usual ±3% rule: the diameter differs by +0.53%.
Side by side
| 275/50R22 | 33x12.50R22 | Difference | |
|---|---|---|---|
| Overall diameter | 32.83" | 33.00" | +0.17" (+0.53%) |
| Section width | 275 mm | 318 mm | +43 mm |
| Sidewall | 5.41" | 5.50" | +0.09" |
| Rim | 22" | 22" | same |
| Circumference | 103.1" | 103.7" | +0.5" |
| Revs per mile | 614 | 611 | -3 |
| Ride height | — | — | +0.09" |
| Speedometer reads 60 mph | 60.0 | 60.3 | +0.3 mph |
Speedometer and odometer
With 33x12.50R22 on a car calibrated for 275/50R22, the speedometer reads 59.7 mph when you're really doing 60, and the odometer under-counts by 0.5%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.2 mph |
| 60 mph | 60.3 mph |
| 70 mph | 70.4 mph |
| 80 mph | 80.4 mph |
Other sizes close to 275/50R22
Questions
Can I replace 275/50R22 with 33x12.50R22?
33x12.50R22 is a safe swap for 275/50R22 by the usual ±3% rule: the diameter differs by +0.53%.
What's the difference between 275/50R22 and 33x12.50R22?
33x12.50R22 is 0.17" taller and 43 mm wider; the sidewall is +0.09". At an indicated 60 mph you'd actually be doing 60.3 mph.
Will 33x12.50R22 fit on 275/50R22 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.