Comparison of tire sizes 275/60 R18 and 285/60 R18
275/60R18
275
Tire width 
60
Profile height 
R18
Tire diameter 
404
RPM per km 275mm165mm787mm2473mm
275
60
18
285
60
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 787 | 799 | +12 (+1.5%) | ||
| Width, mm | 275 | 285 | +10 (+3.6%) | ||
| Circumference, mm | 2473 | 2511 | +38 (+1.5%) | ||
| Profile height, mm | 165 | 171 | +6 (+3.6%) | ||
| RPM per km | 404 | 398 | -6 (-1.5%) | ||
| Clearance change, mm | +6 | ||||
| Result: | The diameter differs by 1.5%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 101.5 |
| Difference (km/h) | 1.5 |
Sizes for comparison of tires 275/60 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
Sizes for comparison of tires 285/60 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2