Comparison of tire sizes 165/80 R13 and 205/50 R15

165
80
13
205
50
15
165/80R13
tire
165 Tire width
80 Profile height
R13 Tire diameter
RPM per km
tire
165mm132mm594mm1867mm536
Parameters Sizes Old New
Diameter, mm594586-8 (-1.3%)
Width, mm165205+40 (+24.2%)
Circumference, mm18671841-26 (-1.4%)
Profile height, mm132103-29 (-22%)
RPM per km536543+7 (+1.3%)
Clearance change, mm-4
Speedometer reading (km/h)98.6-1.4
Result:
The diameter differs by -1.3%.

Sizes for comparison of tires 165/80 R13

R13
R14 +1
R15 +2