Comparison of tire sizes 185/55 R15 and 175/60 R14
185/55R15
185
Tire width 
55
Profile height 
R15
Tire diameter 
545
RPM per km 185mm102mm585mm1836mm
185
55
15
175
60
14
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 585 | 566 | -19 (-3.2%) | ||
| Width, mm | 185 | 175 | -10 (-5.4%) | ||
| Circumference, mm | 1836 | 1777 | -59 (-3.2%) | ||
| Profile height, mm | 102 | 105 | +3 (+2.9%) | ||
| RPM per km | 545 | 563 | +18 (+3.3%) | ||
| Clearance change, mm | -10 | ||||
| Result: | The diameter differs by -3.2%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.8 |
| Difference (km/h) | -3.2 |
Sizes for comparison of tires 185/55 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2
Sizes for comparison of tires 175/60 R14
R14
R13 -1
R15 +1
R16 +2