285/55R22 vs 35x12.50R22
35x12.50R22 is a safe swap for 285/55R22 by the usual ±3% rule: the diameter differs by +1.91%.
Side by side
| 285/55R22 | 35x12.50R22 | Difference | |
|---|---|---|---|
| Overall diameter | 34.34" | 35.00" | +0.66" (+1.91%) |
| Section width | 285 mm | 318 mm | +33 mm |
| Sidewall | 6.17" | 6.50" | +0.33" |
| Rim | 22" | 22" | same |
| Circumference | 107.9" | 110.0" | +2.1" |
| Revs per mile | 587 | 576 | -11 |
| Ride height | — | — | +0.33" |
| Speedometer reads 60 mph | 60.0 | 61.1 | +1.1 mph |
Speedometer and odometer
With 35x12.50R22 on a car calibrated for 285/55R22, the speedometer reads 58.9 mph when you're really doing 60, and the odometer under-counts by 1.9%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.6 mph |
| 45 mph | 45.9 mph |
| 60 mph | 61.1 mph |
| 70 mph | 71.3 mph |
| 80 mph | 81.5 mph |
Other sizes close to 285/55R22
Questions
Can I replace 285/55R22 with 35x12.50R22?
35x12.50R22 is a safe swap for 285/55R22 by the usual ±3% rule: the diameter differs by +1.91%.
What's the difference between 285/55R22 and 35x12.50R22?
35x12.50R22 is 0.66" taller and 33 mm wider; the sidewall is +0.33". At an indicated 60 mph you'd actually be doing 61.1 mph.
Will 35x12.50R22 fit on 285/55R22 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.