Comparison of tire sizes 165/65 R14 and 145/80 R13
165/65R14
165
Tire width 
65
Profile height 
R14
Tire diameter 
558
RPM per km 165mm107mm570mm1791mm
165
65
14
145
80
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 570 | 562 | -8 (-1.4%) | ||
| Width, mm | 165 | 145 | -20 (-12.1%) | ||
| Circumference, mm | 1791 | 1766 | -25 (-1.4%) | ||
| Profile height, mm | 107 | 116 | +9 (+8.4%) | ||
| RPM per km | 558 | 566 | +8 (+1.4%) | ||
| Clearance change, mm | -4 | ||||
| Result: | The diameter differs by -1.4%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 98.6 |
| Difference (km/h) | -1.4 |
Sizes for comparison of tires 165/65 R14
R14
R13 -1
R15 +1
R16 +2
Sizes for comparison of tires 145/80 R13
R13
R14 +1
R15 +2