Comparison of tire sizes 245/35 R20 and 235/30 R20
245/35R20
245
Tire width 
35
Profile height 
R20
Tire diameter 
468
RPM per km 245mm86mm680mm2135mm
245
35
20
235
30
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 680 | 649 | -31 (-4.6%) | ||
| Width, mm | 245 | 235 | -10 (-4.1%) | ||
| Circumference, mm | 2135 | 2039 | -96 (-4.5%) | ||
| Profile height, mm | 86 | 71 | -15 (-17.4%) | ||
| RPM per km | 468 | 490 | +22 (+4.7%) | ||
| Clearance change, mm | -16 | ||||
| Result: | The diameter differs by -4.6%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 95.5 |
| Difference (km/h) | -4.5 |
Sizes for comparison of tires 245/35 R20
R20
R19 -1
R21 +1
R18 -2
Sizes for comparison of tires 235/30 R20
R20
R19 -1
R18 -2