Comparison of tire sizes 155/70 R12 and 175/60 R13
155/70R12
155
Tire width
70
Profile height
R12
Tire diameter
610
RPM per km
155mm109mm522mm1639mm
155
70
12
175
60
13
Parameters Sizes | Old | New | |||
---|---|---|---|---|---|
Diameter, mm | 522 | 540 | +18 (+3.4%) | ||
Width, mm | 155 | 175 | +20 (+12.9%) | ||
Circumference, mm | 1639 | 1697 | +58 (+3.5%) | ||
Profile height, mm | 109 | 105 | -4 (-3.7%) | ||
RPM per km | 610 | 589 | -21 (-3.4%) | ||
Clearance change, mm | +9 | ||||
Result: | The diameter differs by 3.4%. |
Speedometer reading (km/h) | |
---|---|
Real speed (km/h) | 103.5 |
Difference (km/h) | 3.5 |
Sizes for comparison of tires 155/70 R12
R12
R13 +1
R14 +2
Sizes for comparison of tires 175/60 R13
R13
R12 -1
R14 +1
R15 +2