Comparison of tire sizes 275/55 R20 and 245/60 R20
275/55R20
275
Tire width 
55
Profile height 
R20
Tire diameter 
393
RPM per km 275mm151mm811mm2546mm
275
55
20
245
60
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 811 | 802 | -9 (-1.1%) | ||
| Width, mm | 275 | 245 | -30 (-10.9%) | ||
| Circumference, mm | 2546 | 2520 | -26 (-1%) | ||
| Profile height, mm | 151 | 147 | -4 (-2.6%) | ||
| RPM per km | 393 | 397 | +4 (+1%) | ||
| Clearance change, mm | -5 | ||||
| Result: | The diameter differs by -1.1%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 99 |
| Difference (km/h) | -1 |
Sizes for comparison of tires 275/55 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
Sizes for comparison of tires 245/60 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2
