Comparison of tire sizes 135/80 R13 and 145/70 R13

135/80R13
135 Tire width
80 Profile height
R13 Tire diameter
583 RPM per km
135mm108mm546mm1716mm
135
80
13
145
70
13
Parameters Sizes Old New
Diameter, mm546533-13 (-2.4%)
Width, mm135145+10 (+7.4%)
Circumference, mm17161675-41 (-2.4%)
Profile height, mm108102-6 (-5.6%)
RPM per km583597+14 (+2.4%)
Clearance change, mm-7
Result:
The diameter differs by -2.4%.
Speedometer reading (km/h)
Real speed (km/h)97.6
Difference (km/h)-2.4

Sizes for comparison of tires 135/80 R13

R13
R14 +1
R15 +2

Sizes for comparison of tires 145/70 R13

R13
R12 -1
R14 +1