205/45R16 vs 195/50R16
195/50R16 is a safe swap for 205/45R16 by the usual ±3% rule: the diameter differs by +1.78%.
Speedometer and odometer
With 195/50R16 on a car calibrated for 205/45R16, 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 205/45R16
Questions
Can I replace 205/45R16 with 195/50R16?
195/50R16 is a safe swap for 205/45R16 by the usual ±3% rule: the diameter differs by +1.78%.
What's the difference between 205/45R16 and 195/50R16?
195/50R16 is 0.41" taller and 10 mm narrower; the sidewall is +0.21". At an indicated 60 mph you'd actually be doing 61.1 mph.
Will 195/50R16 fit on 205/45R16 wheels?
Both use a 16" rim, so the wheel diameter matches; check the wheel's width range for a 195 mm tire and the fender clearance.