295/65R20 vs 325/60R20
325/60R20 is a safe swap for 295/65R20 by the usual ±3% rule: the diameter differs by +0.73%.
Speedometer and odometer
With 325/60R20 on a car calibrated for 295/65R20, the speedometer reads 59.6 mph when you're really doing 60, and the odometer under-counts by 0.7%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.4 mph |
| 70 mph | 70.5 mph |
| 80 mph | 80.6 mph |
Other sizes close to 295/65R20
Questions
Can I replace 295/65R20 with 325/60R20?
325/60R20 is a safe swap for 295/65R20 by the usual ±3% rule: the diameter differs by +0.73%.
What's the difference between 295/65R20 and 325/60R20?
325/60R20 is 0.26" taller and 30 mm wider; the sidewall is +0.13". At an indicated 60 mph you'd actually be doing 60.4 mph.
Will 325/60R20 fit on 295/65R20 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.