Comparison of tire sizes 245/60 R18 and 235/65 R18
245/60R18
245
Tire width 
60
Profile height 
R18
Tire diameter 
424
RPM per km 245mm147mm751mm2360mm
245
60
18
235
65
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 751 | 763 | +12 (+1.6%) | ||
| Width, mm | 245 | 235 | -10 (-4.1%) | ||
| Circumference, mm | 2360 | 2396 | +36 (+1.5%) | ||
| Profile height, mm | 147 | 153 | +6 (+4.1%) | ||
| RPM per km | 424 | 417 | -7 (-1.7%) | ||
| Clearance change, mm | +6 | ||||
| Result: | The diameter differs by 1.6%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 101.5 |
| Difference (km/h) | 1.5 |
Sizes for comparison of tires 245/60 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
Sizes for comparison of tires 235/65 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2