285/35R22 vs 285/40R22
285/40R22 is outside the ±3% rule as a replacement for 285/35R22: the diameter differs by +3.76%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 285/40R22 on a car calibrated for 285/35R22, the speedometer reads 57.8 mph when you're really doing 60, and the odometer under-counts by 3.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.1 mph |
| 45 mph | 46.7 mph |
| 60 mph | 62.3 mph |
| 70 mph | 72.6 mph |
| 80 mph | 83.0 mph |
Other sizes close to 285/35R22
- 285/35R22 vs 275/40R22+2.70%
- 285/35R22 vs 265/40R22+1.65%
- 285/35R22 vs 265/35R22-1.85%
- 285/35R22 vs 285/40R21+0.41%
- 285/35R22 vs 275/40R21-0.65%
- 285/35R22 vs 315/35R21-0.58%
- 285/35R22 vs 275/35R22-0.92%
- 285/35R22 vs 295/35R22+0.92%
- 285/35R22 vs 315/35R22+2.77%
- 285/35R22 vs 325/35R22+3.69%
- 285/35R22 vs 285/30R22-3.76%
- 285/35R22 vs 255/45R21+0.61%
Questions
Can I replace 285/35R22 with 285/40R22?
285/40R22 is outside the ±3% rule as a replacement for 285/35R22: the diameter differs by +3.76%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 285/35R22 and 285/40R22?
285/40R22 is 1.12" taller and 0 mm wider; the sidewall is +0.56". At an indicated 60 mph you'd actually be doing 62.3 mph.
Will 285/40R22 fit on 285/35R22 wheels?
Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 285 mm tire and the fender clearance.