205/65R16 vs 245/50R17
245/50R17 is a safe swap for 205/65R16 by the usual ±3% rule: the diameter differs by +0.58%.
Speedometer and odometer
With 245/50R17 on a car calibrated for 205/65R16, the speedometer reads 59.7 mph when you're really doing 60, and the odometer under-counts by 0.6%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 30.2 mph |
| 45 mph | 45.3 mph |
| 60 mph | 60.3 mph |
| 70 mph | 70.4 mph |
| 80 mph | 80.5 mph |
Other sizes close to 205/65R16
- 205/65R16 vs 225/55R17+0.95%
- 205/65R16 vs 215/55R17-0.68%
- 205/65R16 vs 215/65R16+1.93%
- 205/65R16 vs 215/55R16-4.46%
- 205/65R16 vs 215/60R16-1.26%
- 205/65R16 vs 205/60R16-3.05%
- 205/65R16 vs 225/60R16+0.52%
- 205/65R16 vs 235/50R17-0.91%
- 205/65R16 vs 225/65R16+3.86%
- 205/65R16 vs 235/60R16+2.30%
- 205/65R16 vs 225/55R16-2.82%
- 205/65R16 vs 205/70R15-0.73%
Questions
Can I replace 205/65R16 with 245/50R17?
245/50R17 is a safe swap for 205/65R16 by the usual ±3% rule: the diameter differs by +0.58%.
What's the difference between 205/65R16 and 245/50R17?
245/50R17 is 0.15" taller and 40 mm wider; the sidewall is -0.42". At an indicated 60 mph you'd actually be doing 60.3 mph.
Will 245/50R17 fit on 205/65R16 wheels?
No — 205/65R16 needs a 16" wheel and 245/50R17 a 17" wheel. This is a plus/minus-size swap that changes wheels too.