Comparison of tire sizes 175/55 R15 and 185/60 R13
175/55R15
175
Tire width 
55
Profile height 
R15
Tire diameter 
555
RPM per km 175mm96mm574mm1802mm
175
55
15
185
60
13
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 574 | 552 | -22 (-3.8%) | ||
| Width, mm | 175 | 185 | +10 (+5.7%) | ||
| Circumference, mm | 1802 | 1735 | -67 (-3.7%) | ||
| Profile height, mm | 96 | 111 | +15 (+15.6%) | ||
| RPM per km | 555 | 576 | +21 (+3.8%) | ||
| Clearance change, mm | -11 | ||||
| Result: | The diameter differs by -3.8%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.3 |
| Difference (km/h) | -3.7 |
Sizes for comparison of tires 175/55 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2
Sizes for comparison of tires 185/60 R13
R13
R14 +1
R15 +2