Comparison of tire sizes 165/65 R15 and 175/55 R15
165/65R15
165
Tire width 
65
Profile height 
R15
Tire diameter 
535
RPM per km 165mm107mm596mm1871mm
165
65
15
175
55
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 596 | 574 | -22 (-3.7%) | ||
| Width, mm | 165 | 175 | +10 (+6.1%) | ||
| Circumference, mm | 1871 | 1802 | -69 (-3.7%) | ||
| Profile height, mm | 107 | 96 | -11 (-10.3%) | ||
| RPM per km | 535 | 555 | +20 (+3.7%) | ||
| Clearance change, mm | -11 | ||||
| Result: | The diameter differs by -3.7%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.3 |
| Difference (km/h) | -3.7 |
Sizes for comparison of tires 165/65 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2
Sizes for comparison of tires 175/55 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2