285/30R22 vs 315/30R22
315/30R22 is a safe swap for 285/30R22 by the usual ±3% rule: the diameter differs by +2.47%.
Speedometer and odometer
With 315/30R22 on a car calibrated for 285/30R22, the speedometer reads 58.6 mph when you're really doing 60, and the odometer under-counts by 2.5%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.7 mph |
| 45 mph | 46.1 mph |
| 60 mph | 61.5 mph |
| 70 mph | 71.7 mph |
| 80 mph | 82.0 mph |
Other sizes close to 285/30R22
- 285/30R22 vs 275/35R21-0.53%
- 285/30R22 vs 265/35R22+1.99%
- 285/30R22 vs 285/35R22+3.91%
- 285/30R22 vs 325/30R21-0.19%
- 285/30R22 vs 285/35R21+0.42%
- 285/30R22 vs 245/40R21-0.05%
- 285/30R22 vs 275/35R22+2.95%
- 285/30R22 vs 295/35R22+4.86%
- 285/30R22 vs 295/30R22+0.82%
- 285/30R22 vs 255/40R22+4.52%
- 285/30R22 vs 265/30R22-1.64%
- 285/30R22 vs 255/30R22-2.47%
Questions
Can I replace 285/30R22 with 315/30R22?
315/30R22 is a safe swap for 285/30R22 by the usual ±3% rule: the diameter differs by +2.47%.
What's the difference between 285/30R22 and 315/30R22?
315/30R22 is 0.71" taller and 30 mm wider; the sidewall is +0.35". At an indicated 60 mph you'd actually be doing 61.5 mph.
Will 315/30R22 fit on 285/30R22 wheels?
Both use a 22" rim, so the wheel diameter matches; check the wheel's width range for a 315 mm tire and the fender clearance.