Comparison of tire sizes 275/35 R20 and 285/30 R20
275/35R20
275
Tire width 
35
Profile height 
R20
Tire diameter 
454
RPM per km 275mm96mm701mm2201mm
275
35
20
285
30
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 701 | 679 | -22 (-3.1%) | ||
| Width, mm | 275 | 285 | +10 (+3.6%) | ||
| Circumference, mm | 2201 | 2133 | -68 (-3.1%) | ||
| Profile height, mm | 96 | 86 | -10 (-10.4%) | ||
| RPM per km | 454 | 469 | +15 (+3.3%) | ||
| Clearance change, mm | -11 | ||||
| Result: | The diameter differs by -3.1%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.9 |
| Difference (km/h) | -3.1 |
Sizes for comparison of tires 275/35 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
Sizes for comparison of tires 285/30 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2