Comparison of tire sizes 195/65 R15 and 225/50 R15
195/65R15
195
Tire width 
65
Profile height 
R15
Tire diameter 
502
RPM per km 195mm127mm635mm1993mm
195
65
15
225
50
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 635 | 606 | -29 (-4.6%) | ||
| Width, mm | 195 | 225 | +30 (+15.4%) | ||
| Circumference, mm | 1993 | 1904 | -89 (-4.5%) | ||
| Profile height, mm | 127 | 113 | -14 (-11%) | ||
| RPM per km | 502 | 525 | +23 (+4.6%) | ||
| Clearance change, mm | -15 | ||||
| Result: | The diameter differs by -4.6%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 95.5 |
| Difference (km/h) | -4.5 |
Sizes for comparison of tires 195/65 R15
R15
R14 -1
R16 +1
R17 +2
Sizes for comparison of tires 225/50 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2