Comparison of tire sizes 285/45 R22 and 275/55 R20
285/45R22
285
Tire width 
45
Profile height 
R22
Tire diameter 
390
RPM per km 285mm128mm815mm2561mm
285
45
22
275
55
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 815 | 811 | -4 (-0.5%) | ||
| Width, mm | 285 | 275 | -10 (-3.5%) | ||
| Circumference, mm | 2561 | 2546 | -15 (-0.6%) | ||
| Profile height, mm | 128 | 151 | +23 (+18%) | ||
| RPM per km | 390 | 393 | +3 (+0.8%) | ||
| Clearance change, mm | -2 | ||||
| Result: | The diameter differs by -0.5%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 99.4 |
| Difference (km/h) | -0.6 |
Sizes for comparison of tires 285/45 R22
R22
R20 -2
Sizes for comparison of tires 275/55 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2