325/50R22 vs 35x12.50R22
35x12.50R22 is a safe swap for 325/50R22 by the usual ±3% rule: the diameter differs by +0.59%.
Side by side
| 325/50R22 | 35x12.50R22 | Difference | |
|---|---|---|---|
| Overall diameter | 34.80" | 35.00" | +0.20" (+0.59%) |
| Section width | 325 mm | 318 mm | -7 mm |
| Sidewall | 6.40" | 6.50" | +0.10" |
| Rim | 22" | 22" | same |
| Circumference | 109.3" | 110.0" | +0.6" |
| Revs per mile | 580 | 576 | -3 |
| Ride height | — | — | +0.10" |
| Speedometer reads 60 mph | 60.0 | 60.4 | +0.4 mph |
Speedometer and odometer
With 35x12.50R22 on a car calibrated for 325/50R22, the speedometer reads 59.6 mph when you're really doing 60, and the odometer under-counts by 0.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.4 mph |
| 70 mph | 70.4 mph |
| 80 mph | 80.5 mph |
Other sizes close to 325/50R22
Questions
Can I replace 325/50R22 with 35x12.50R22?
35x12.50R22 is a safe swap for 325/50R22 by the usual ±3% rule: the diameter differs by +0.59%.
What's the difference between 325/50R22 and 35x12.50R22?
35x12.50R22 is 0.20" taller and 7 mm narrower; the sidewall is +0.10". At an indicated 60 mph you'd actually be doing 60.4 mph.
Will 35x12.50R22 fit on 325/50R22 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.