Comparison of tire sizes 285/65 R18 and 285/75 R16
285/65R18
285
Tire width 
65
Profile height 
R18
Tire diameter 
385
RPM per km 285mm185mm828mm2600mm
285
65
18
285
75
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 828 | 834 | +6 (+0.7%) | ||
| Width, mm | 285 | 285 | 0 (0%) | ||
| Circumference, mm | 2600 | 2620 | +20 (+0.8%) | ||
| Profile height, mm | 185 | 214 | +29 (+15.7%) | ||
| RPM per km | 385 | 382 | -3 (-0.8%) | ||
| Clearance change, mm | +3 | ||||
| Result: | The diameter differs by 0.7%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 100.8 |
| Difference (km/h) | 0.8 |
Sizes for comparison of tires 285/65 R18
R18
R17 -1
R16 -2
R20 +2
Sizes for comparison of tires 285/75 R16
R16
R17 +1
R18 +2
