Comparison of tire sizes 155/70 R12 and 135/70 R13
155/70R12
155
Tire width
70
Profile height
R12
Tire diameter
610
RPM per km
155mm109mm522mm1639mm
155
70
12
135
70
13
Parameters Sizes | Old | New | |||
---|---|---|---|---|---|
Diameter, mm | 522 | 519 | -3 (-0.6%) | ||
Width, mm | 155 | 135 | -20 (-12.9%) | ||
Circumference, mm | 1639 | 1631 | -8 (-0.5%) | ||
Profile height, mm | 109 | 95 | -14 (-12.8%) | ||
RPM per km | 610 | 613 | +3 (+0.5%) | ||
Clearance change, mm | -2 | ||||
Result: | The diameter differs by -0.6%. |
Speedometer reading (km/h) | |
---|---|
Real speed (km/h) | 99.5 |
Difference (km/h) | -0.5 |
Sizes for comparison of tires 155/70 R12
R12
R13 +1
R14 +2
Sizes for comparison of tires 135/70 R13
R13
R12 -1
R14 +1