Comparison of tire sizes 185/60 R15 and 185/55 R15
185/60R15
185
Tire width 
60
Profile height 
R15
Tire diameter 
528
RPM per km 185mm111mm603mm1894mm
185
60
15
185
55
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 603 | 585 | -18 (-3%) | ||
| Width, mm | 185 | 185 | 0 (0%) | ||
| Circumference, mm | 1894 | 1836 | -58 (-3.1%) | ||
| Profile height, mm | 111 | 102 | -9 (-8.1%) | ||
| RPM per km | 528 | 545 | +17 (+3.2%) | ||
| Clearance change, mm | -9 | ||||
| Result: | The diameter differs by -3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.9 |
| Difference (km/h) | -3.1 |
Sizes for comparison of tires 185/60 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2
Sizes for comparison of tires 185/55 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2