Comparison of tire sizes 185/55 R15 and 205/40 R17
185/55R15
185
Tire width 
55
Profile height 
R15
Tire diameter 
545
RPM per km 185mm102mm585mm1836mm
185
55
15
205
40
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 585 | 596 | +11 (+1.9%) | ||
| Width, mm | 185 | 205 | +20 (+10.8%) | ||
| Circumference, mm | 1836 | 1872 | +36 (+2%) | ||
| Profile height, mm | 102 | 82 | -20 (-19.6%) | ||
| RPM per km | 545 | 534 | -11 (-2%) | ||
| Clearance change, mm | +6 | ||||
| Result: | The diameter differs by 1.9%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 102 |
| Difference (km/h) | 2 |
Sizes for comparison of tires 185/55 R15
R15
R14 -1
R16 +1
R13 -2
R17 +2
Sizes for comparison of tires 205/40 R17
R17
R16 -1
R18 +1
R15 -2
