275/35R22 vs 255/40R22
255/40R22 is a safe swap for 275/35R22 by the usual ±3% rule: the diameter differs by +1.53%.
Speedometer and odometer
With 255/40R22 on a car calibrated for 275/35R22, the speedometer reads 59.1 mph when you're really doing 60, and the odometer under-counts by 1.5%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.7 mph |
| 60 mph | 60.9 mph |
| 70 mph | 71.1 mph |
| 80 mph | 81.2 mph |
Other sizes close to 275/35R22
- 275/35R22 vs 265/40R21-0.79%
- 275/35R22 vs 275/40R22+3.66%
- 275/35R22 vs 265/40R22+2.60%
- 275/35R22 vs 265/35R22-0.93%
- 275/35R22 vs 285/35R22+0.93%
- 275/35R22 vs 285/40R22+4.73%
- 275/35R22 vs 275/40R21+0.28%
- 275/35R22 vs 315/35R21+0.35%
- 275/35R22 vs 295/35R22+1.86%
- 275/35R22 vs 315/35R22+3.73%
- 275/35R22 vs 325/35R22+4.66%
- 275/35R22 vs 285/30R22-2.86%
Questions
Can I replace 275/35R22 with 255/40R22?
255/40R22 is a safe swap for 275/35R22 by the usual ±3% rule: the diameter differs by +1.53%.
What's the difference between 275/35R22 and 255/40R22?
255/40R22 is 0.45" taller and 20 mm narrower; the sidewall is +0.23". At an indicated 60 mph you'd actually be doing 60.9 mph.
Will 255/40R22 fit on 275/35R22 wheels?
Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 255 mm tire and the fender clearance.