Comparison of tire sizes 165/80 R13 and 185/65 R13
165/80R13
165
Tire width 
80
Profile height 
R13
Tire diameter 
536
RPM per km 165mm132mm594mm1867mm
165
80
13
185
65
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 594 | 571 | -23 (-3.9%) | ||
| Width, mm | 165 | 185 | +20 (+12.1%) | ||
| Circumference, mm | 1867 | 1793 | -74 (-4%) | ||
| Profile height, mm | 132 | 120 | -12 (-9.1%) | ||
| RPM per km | 536 | 558 | +22 (+4.1%) | ||
| Clearance change, mm | -12 | ||||
| Result: | The diameter differs by -3.9%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96 |
| Difference (km/h) | -4 |
Sizes for comparison of tires 165/80 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 185/65 R13
R13
R14 +1
R15 +2