245/50R16 vs 205/65R16
205/65R16 is outside the ±3% rule as a replacement for 245/50R16: the diameter differs by +3.30%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
Speedometer and odometer
With 205/65R16 on a car calibrated for 245/50R16, the speedometer reads 58.1 mph when you're really doing 60, and the odometer under-counts by 3.3%.
| Speedo shows | Actual speed |
|---|---|
| 30 mph | 31.0 mph |
| 45 mph | 46.5 mph |
| 60 mph | 62.0 mph |
| 70 mph | 72.3 mph |
| 80 mph | 82.6 mph |
Other sizes close to 245/50R16
- 245/50R16 vs 225/50R17+0.83%
- 245/50R16 vs 205/55R16-2.99%
- 245/50R16 vs 215/50R17-0.71%
- 245/50R16 vs 245/45R17+0.14%
- 245/50R16 vs 215/55R16-1.30%
- 245/50R16 vs 215/60R16+2.00%
- 245/50R16 vs 205/60R16+0.15%
- 245/50R16 vs 225/60R16+3.84%
- 245/50R16 vs 205/65R15-0.60%
- 245/50R16 vs 195/55R16-4.68%
- 245/50R16 vs 225/50R16-3.07%
- 245/50R16 vs 225/55R16+0.38%
Questions
Can I replace 245/50R16 with 205/65R16?
205/65R16 is outside the ±3% rule as a replacement for 245/50R16: the diameter differs by +3.30%, so the speedometer, odometer and ABS calibration will be off and clearance needs checking.
What's the difference between 245/50R16 and 205/65R16?
205/65R16 is 0.85" taller and 40 mm narrower; the sidewall is +0.42". At an indicated 60 mph you'd actually be doing 62.0 mph.
Will 205/65R16 fit on 245/50R16 wheels?
Both use a 16" rim, so the wheel diameter matches; check the wheel's width range for a 205 mm tire and the fender clearance.