195/55R15 vs 225/50R15
225/50R15 is a safe swap for 195/55R15 by the usual ±3% rule: the diameter differs by +1.76%.
Speedometer and odometer
With 225/50R15 on a car calibrated for 195/55R15, the speedometer reads 59.0 mph when you're really doing 60, and the odometer under-counts by 1.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.5 mph |
| 45 mph | 45.8 mph |
| 60 mph | 61.1 mph |
| 70 mph | 71.2 mph |
| 80 mph | 81.4 mph |
Other sizes close to 195/55R15
- 195/55R15 vs 185/65R15+4.37%
- 195/55R15 vs 185/60R15+1.26%
- 195/55R15 vs 195/60R15+3.27%
- 195/55R15 vs 175/65R15+2.18%
- 195/55R15 vs 185/65R14+0.10%
- 195/55R15 vs 205/50R15-1.60%
- 195/55R15 vs 195/50R16+0.99%
- 195/55R15 vs 185/55R15-1.85%
- 195/55R15 vs 205/45R16-0.77%
- 195/55R15 vs 175/70R14+0.86%
- 195/55R15 vs 225/45R15-2.02%
- 195/55R15 vs 195/50R15-3.27%
Questions
Can I replace 195/55R15 with 225/50R15?
225/50R15 is a safe swap for 195/55R15 by the usual ±3% rule: the diameter differs by +1.76%.
What's the difference between 195/55R15 and 225/50R15?
225/50R15 is 0.41" taller and 30 mm wider; the sidewall is +0.21". At an indicated 60 mph you'd actually be doing 61.1 mph.
Will 225/50R15 fit on 195/55R15 wheels?
Both use a 15" rim, so the wheel diameter matches; check the wheel's width range for a 225 mm tire and the fender clearance.