Comparison of tire sizes 285/45 R22 and 305/45 R22
285/45R22
285
Tire width 
45
Profile height 
R22
Tire diameter 
390
RPM per km 285mm128mm815mm2561mm
285
45
22
305
45
22
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 815 | 833 | +18 (+2.2%) | ||
| Width, mm | 285 | 305 | +20 (+7%) | ||
| Circumference, mm | 2561 | 2618 | +57 (+2.2%) | ||
| Profile height, mm | 128 | 137 | +9 (+7%) | ||
| RPM per km | 390 | 382 | -8 (-2.1%) | ||
| Clearance change, mm | +9 | ||||
| Result: | The diameter differs by 2.2%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 102.2 |
| Difference (km/h) | 2.2 |
Sizes for comparison of tires 285/45 R22
R22
R20 -2
Sizes for comparison of tires 305/45 R22
R22
R20 -2
