Comparison of tire sizes 205/80 R14 and 185/80 R15
205/80R14
205
Tire width 
80
Profile height 
R14
Tire diameter 
466
RPM per km 205mm164mm684mm2148mm
205
80
14
185
80
15
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 684 | 677 | -7 (-1%) | ||
| Width, mm | 205 | 185 | -20 (-9.8%) | ||
| Circumference, mm | 2148 | 2127 | -21 (-1%) | ||
| Profile height, mm | 164 | 148 | -16 (-9.8%) | ||
| RPM per km | 466 | 470 | +4 (+0.9%) | ||
| Clearance change, mm | -4 | ||||
| Result: | The diameter differs by -1%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 99 |
| Difference (km/h) | -1 |
Sizes for comparison of tires 205/80 R14
R14
R15 +1
R16 +2
Sizes for comparison of tires 185/80 R15
R15
R14 -1
R16 +1
R17 +2
