Comparison of tire sizes 185/55 R15 and 205/60 R14

185/55R15
185 Tire width
55 Profile height
R15 Tire diameter
545 RPM per km
185mm102mm585mm1836mm
185
55
15
205
60
14
Parameters Sizes Old New
Diameter, mm585602+17 (+2.9%)
Width, mm185205+20 (+10.8%)
Circumference, mm18361890+54 (+2.9%)
Profile height, mm102123+21 (+20.6%)
RPM per km545529-16 (-2.9%)
Clearance change, mm+9
Result:
The diameter differs by 2.9%.
Speedometer reading (km/h)
Real speed (km/h)102.9
Difference (km/h)2.9

Sizes for comparison of tires 185/55 R15

R15
R14 -1
R16 +1
R13 -2
R17 +2

Sizes for comparison of tires 205/60 R14

R14
R13 -1
R15 +1
R16 +2