Comparison of tire sizes 245/40 R19 and 285/35 R20
245/40R19
245
Tire width 
40
Profile height 
R19
Tire diameter 
469
RPM per km 245mm98mm679mm2132mm
245
40
19
285
35
20
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 679 | 708 | +29 (+4.3%) | ||
| Width, mm | 245 | 285 | +40 (+16.3%) | ||
| Circumference, mm | 2132 | 2223 | +91 (+4.3%) | ||
| Profile height, mm | 98 | 100 | +2 (+2%) | ||
| RPM per km | 469 | 450 | -19 (-4.1%) | ||
| Clearance change, mm | +15 | ||||
| Result: | The diameter differs by 4.3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 104.3 |
| Difference (km/h) | 4.3 |
Sizes for comparison of tires 245/40 R19
R19
R18 -1
R20 +1
R17 -2
R21 +2
Sizes for comparison of tires 285/35 R20
R20
R19 -1
R21 +1
R18 -2
R22 +2