Comparison of tire sizes 165/65 R15 and 175/55 R15

165
65
15
175
55
15
165/65R15
tire
165 Tire width
65 Profile height
R15 Tire diameter
RPM per km
tire
165mm107mm596mm1871mm535
Parameters Sizes Old New
Diameter, mm596574-22 (-3.7%)
Width, mm165175+10 (+6.1%)
Circumference, mm18711802-69 (-3.7%)
Profile height, mm10796-11 (-10.3%)
RPM per km535555+20 (+3.7%)
Clearance change, mm-11
Speedometer reading (km/h)96.3-3.7
Result:
The diameter differs by -3.7%.

Sizes for comparison of tires 165/65 R15

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