Comparison of tire sizes 285/65 R18 and 275/70 R16
285/65R18
285
Tire width 
65
Profile height 
R18
Tire diameter 
385
RPM per km 285mm185mm828mm2600mm
285
65
18
275
70
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 828 | 791 | -37 (-4.5%) | ||
| Width, mm | 285 | 275 | -10 (-3.5%) | ||
| Circumference, mm | 2600 | 2486 | -114 (-4.4%) | ||
| Profile height, mm | 185 | 193 | +8 (+4.3%) | ||
| RPM per km | 385 | 402 | +17 (+4.4%) | ||
| Clearance change, mm | -19 | ||||
| Result: | The diameter differs by -4.5%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 95.6 |
| Difference (km/h) | -4.4 |
Sizes for comparison of tires 285/65 R18
R18
R17 -1
R16 -2
R20 +2
Sizes for comparison of tires 275/70 R16
R16
R17 +1
R18 +2
