Comparison of tire sizes 155/70 R12 and 155/65 R13
155/70R12
155
Tire width
70
Profile height
R12
Tire diameter
610
RPM per km
155mm109mm522mm1639mm
155
70
12
155
65
13
Parameters Sizes | Old | New | |||
---|---|---|---|---|---|
Diameter, mm | 522 | 532 | +10 (+1.9%) | ||
Width, mm | 155 | 155 | 0 (0%) | ||
Circumference, mm | 1639 | 1670 | +31 (+1.9%) | ||
Profile height, mm | 109 | 101 | -8 (-7.3%) | ||
RPM per km | 610 | 599 | -11 (-1.8%) | ||
Clearance change, mm | +5 | ||||
Result: | The diameter differs by 1.9%. |
Speedometer reading (km/h) | |
---|---|
Real speed (km/h) | 101.9 |
Difference (km/h) | 1.9 |
Sizes for comparison of tires 155/70 R12
R12
R13 +1
R14 +2
Sizes for comparison of tires 155/65 R13
R13
R12 -1
R14 +1