Comparison of tire sizes 135/80 R13 and 145/65 R15
135/80R13
135
Tire width 
80
Profile height 
R13
Tire diameter 
583
RPM per km 135mm108mm546mm1716mm
135
80
13
145
65
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 546 | 570 | +24 (+4.4%) | ||
| Width, mm | 135 | 145 | +10 (+7.4%) | ||
| Circumference, mm | 1716 | 1789 | +73 (+4.3%) | ||
| Profile height, mm | 108 | 94 | -14 (-13%) | ||
| RPM per km | 583 | 559 | -24 (-4.1%) | ||
| Clearance change, mm | +12 | ||||
| Result: | The diameter differs by 4.4%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 104.3 |
| Difference (km/h) | 4.3 |
Sizes for comparison of tires 135/80 R13
R13
R14 +1
R15 +2
Sizes for comparison of tires 145/65 R15
R15
R14 -1
R16 +1
R13 -2