205/50R15 vs 205/45R16
205/45R16 is a safe swap for 205/50R15 by the usual ±3% rule: the diameter differs by +0.84%.
Speedometer and odometer
With 205/45R16 on a car calibrated for 205/50R15, the speedometer reads 59.5 mph when you're really doing 60, and the odometer under-counts by 0.8%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.3 mph |
| 45 mph | 45.4 mph |
| 60 mph | 60.5 mph |
| 70 mph | 70.6 mph |
| 80 mph | 80.7 mph |
Other sizes close to 205/50R15
- 205/50R15 vs 185/60R15+2.90%
- 205/50R15 vs 195/60R15+4.95%
- 205/50R15 vs 175/65R15+3.84%
- 205/50R15 vs 185/55R15-0.26%
- 205/50R15 vs 195/55R15+1.62%
- 205/50R15 vs 175/65R14-0.49%
- 205/50R15 vs 225/45R15-0.43%
- 205/50R15 vs 195/50R15-1.71%
- 205/50R15 vs 225/50R15+3.41%
- 205/50R15 vs 195/60R14+0.61%
- 205/50R15 vs 245/40R15-1.54%
Questions
Can I replace 205/50R15 with 205/45R16?
205/45R16 is a safe swap for 205/50R15 by the usual ±3% rule: the diameter differs by +0.84%.
What's the difference between 205/50R15 and 205/45R16?
205/45R16 is 0.19" taller and 0 mm wider; the sidewall is -0.40". At an indicated 60 mph you'd actually be doing 60.5 mph.
Will 205/45R16 fit on 205/50R15 wheels?
No — 205/50R15 needs a 15" wheel and 205/45R16 a 16" wheel. This is a plus/minus-size swap that changes wheels too.