Comparison of tire sizes 235/70 R17 and 255/65 R16
235/70R17
235
Tire width 
70
Profile height 
R17
Tire diameter 
418
RPM per km 235mm165mm761mm2390mm
235
70
17
255
65
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 761 | 738 | -23 (-3%) | ||
| Width, mm | 235 | 255 | +20 (+8.5%) | ||
| Circumference, mm | 2390 | 2318 | -72 (-3%) | ||
| Profile height, mm | 165 | 166 | +1 (+0.6%) | ||
| RPM per km | 418 | 431 | +13 (+3.1%) | ||
| Clearance change, mm | -12 | ||||
| Result: | The diameter differs by -3%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 97 |
| Difference (km/h) | -3 |
Sizes for comparison of tires 235/70 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2
Sizes for comparison of tires 255/65 R16
R16
R15 -1
R17 +1
R18 +2
