Comparison of tire sizes 165/80 R13 and 205/50 R15
165/80R13
165
Tire width 
80
Profile height 
R13
Tire diameter 
536
RPM per km 165mm132mm594mm1867mm
165
80
13
205
50
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 594 | 586 | -8 (-1.3%) | ||
| Width, mm | 165 | 205 | +40 (+24.2%) | ||
| Circumference, mm | 1867 | 1841 | -26 (-1.4%) | ||
| Profile height, mm | 132 | 103 | -29 (-22%) | ||
| RPM per km | 536 | 543 | +7 (+1.3%) | ||
| Clearance change, mm | -4 | ||||
| Result: | The diameter differs by -1.3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 98.6 |
| Difference (km/h) | -1.4 |
Sizes for comparison of tires 165/80 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 205/50 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2