Comparison of tire sizes 165/80 R13 and 185/70 R13

165/80R13
165 Tire width
80 Profile height
R13 Tire diameter
536 RPM per km
165mm132mm594mm1867mm
165
80
13
185
70
13
Parameters Sizes Old New
Diameter, mm594589-5 (-0.8%)
Width, mm165185+20 (+12.1%)
Circumference, mm18671851-16 (-0.9%)
Profile height, mm132130-2 (-1.5%)
RPM per km536540+4 (+0.7%)
Clearance change, mm-3
Result:
The diameter differs by -0.8%.
Speedometer reading (km/h)
Real speed (km/h)99.1
Difference (km/h)-0.9

Sizes for comparison of tires 165/80 R13

R13
R14 +1
R15 +2

Sizes for comparison of tires 185/70 R13

R13
R14 +1
R15 +2