Comparison of tire sizes 145/80 R13 and 185/60 R14
145/80R13
145
Tire width 
80
Profile height 
R13
Tire diameter 
566
RPM per km 145mm116mm562mm1766mm
145
80
13
185
60
14
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 562 | 578 | +16 (+2.8%) | ||
| Width, mm | 145 | 185 | +40 (+27.6%) | ||
| Circumference, mm | 1766 | 1815 | +49 (+2.8%) | ||
| Profile height, mm | 116 | 111 | -5 (-4.3%) | ||
| RPM per km | 566 | 551 | -15 (-2.7%) | ||
| Clearance change, mm | +8 | ||||
| Result: | The diameter differs by 2.8%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 102.8 |
| Difference (km/h) | 2.8 |
Sizes for comparison of tires 145/80 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 185/60 R14
R14
R13 -1
R15 +1
R16 +2
