Comparison of tire sizes 265/70 R17 and 285/60 R18
265/70R17
265
Tire width 
70
Profile height 
R17
Tire diameter 
396
RPM per km 265mm186mm803mm2522mm
265
70
17
285
60
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 803 | 799 | -4 (-0.5%) | ||
| Width, mm | 265 | 285 | +20 (+7.5%) | ||
| Circumference, mm | 2522 | 2511 | -11 (-0.4%) | ||
| Profile height, mm | 186 | 171 | -15 (-8.1%) | ||
| RPM per km | 396 | 398 | +2 (+0.5%) | ||
| Clearance change, mm | -2 | ||||
| Result: | The diameter differs by -0.5%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 99.6 |
| Difference (km/h) | -0.4 |
Sizes for comparison of tires 265/70 R17
R17
R16 -1
R18 +1
R19 +2
Sizes for comparison of tires 285/60 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
