295/60R20 vs 325/60R20
325/60R20 is outside the ±3% rule as a replacement for 295/60R20: the diameter differs by +4.18%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 325/60R20 on a car calibrated for 295/60R20, the speedometer reads 57.6 mph when you're really doing 60, and the odometer under-counts by 4.2%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.3 mph |
| 45 mph | 46.9 mph |
| 60 mph | 62.5 mph |
| 70 mph | 72.9 mph |
| 80 mph | 83.3 mph |
Other sizes close to 295/60R20
- 295/60R20 vs 275/60R20-2.78%
- 295/60R20 vs 275/65R20+0.41%
- 295/60R20 vs 35x12.50R20+3.13%
- 295/60R20 vs 265/60R20-4.18%
- 295/60R20 vs 305/55R20-2.15%
- 295/60R20 vs 285/55R20-4.70%
- 295/60R20 vs 285/60R20-1.39%
- 295/60R20 vs 33x12.50R20-2.76%
- 295/60R20 vs 295/55R20-3.42%
- 295/60R20 vs 295/65R20+3.42%
- 295/60R20 vs 285/65R20+1.91%
- 295/60R20 vs 35x11.50R20+3.13%
Questions
Can I replace 295/60R20 with 325/60R20?
325/60R20 is outside the ±3% rule as a replacement for 295/60R20: the diameter differs by +4.18%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 295/60R20 and 325/60R20?
325/60R20 is 1.42" taller and 30 mm wider; the sidewall is +0.71". At an indicated 60 mph you'd actually be doing 62.5 mph.
Will 325/60R20 fit on 295/60R20 wheels?
Both use a 20" rim, so the wheel diameter matches; check the wheel's width range for a 325 mm tire and the fender clearance.