195/55R15 vs 185/65R14
185/65R14 is a safe swap for 195/55R15 by the usual ±3% rule: the diameter differs by +0.10%.
Speedometer and odometer
With 185/65R14 on a car calibrated for 195/55R15, the speedometer reads 59.9 mph when you're really doing 60, and the odometer under-counts by 0.1%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.0 mph |
| 45 mph | 45.0 mph |
| 60 mph | 60.1 mph |
| 70 mph | 70.1 mph |
| 80 mph | 80.1 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 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%
- 195/55R15 vs 225/50R15+1.76%
Questions
Can I replace 195/55R15 with 185/65R14?
185/65R14 is a safe swap for 195/55R15 by the usual ±3% rule: the diameter differs by +0.10%.
What's the difference between 195/55R15 and 185/65R14?
185/65R14 is 0.02" taller and 10 mm narrower; the sidewall is +0.51". At an indicated 60 mph you'd actually be doing 60.1 mph.
Will 185/65R14 fit on 195/55R15 wheels?
No — 195/55R15 needs a 15" wheel and 185/65R14 a 14" wheel. This is a plus/minus-size swap that changes wheels too.