Comparison of tire sizes 135/70 R13 and 155/70 R12
135/70R13
135
Tire width 
70
Profile height 
R13
Tire diameter 
613
RPM per km 135mm95mm519mm1631mm
135
70
13
155
70
12
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 519 | 522 | +3 (+0.6%) | ||
| Width, mm | 135 | 155 | +20 (+14.8%) | ||
| Circumference, mm | 1631 | 1639 | +8 (+0.5%) | ||
| Profile height, mm | 95 | 109 | +14 (+14.7%) | ||
| RPM per km | 613 | 610 | -3 (-0.5%) | ||
| Clearance change, mm | +2 | ||||
| Result: | The diameter differs by 0.6%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 100.5 |
| Difference (km/h) | 0.5 |
Sizes for comparison of tires 135/70 R13
R13
R12 -1
R14 +1
Sizes for comparison of tires 155/70 R12
R12
R13 +1
R14 +2