Comparison of tire sizes 275/50 R20 and 285/50 R20
275/50R20
275
Tire width 
50
Profile height 
R20
Tire diameter 
407
RPM per km 275mm138mm783mm2460mm
275
50
20
285
50
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 783 | 793 | +10 (+1.3%) | ||
| Width, mm | 275 | 285 | +10 (+3.6%) | ||
| Circumference, mm | 2460 | 2491 | +31 (+1.3%) | ||
| Profile height, mm | 138 | 143 | +5 (+3.6%) | ||
| RPM per km | 407 | 401 | -6 (-1.5%) | ||
| Clearance change, mm | +5 | ||||
| Result: | The diameter differs by 1.3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 101.3 |
| Difference (km/h) | 1.3 |
Sizes for comparison of tires 275/50 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
Sizes for comparison of tires 285/50 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
