Comparison of tire sizes 255/55 R17 and 255/50 R16
255/55R17
255
Tire width 
55
Profile height 
R17
Tire diameter 
447
RPM per km 255mm140mm712mm2238mm
255
55
17
255
50
16
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 712 | 661 | -51 (-7.2%) | ||
| Width, mm | 255 | 255 | 0 (0%) | ||
| Circumference, mm | 2238 | 2078 | -160 (-7.1%) | ||
| Profile height, mm | 140 | 128 | -12 (-8.6%) | ||
| RPM per km | 447 | 481 | +34 (+7.6%) | ||
| Clearance change, mm | -26 | ||||
| Result: | The diameter differs by -7.2%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 92.9 |
| Difference (km/h) | -7.1 |
Sizes for comparison of tires 255/55 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2
Sizes for comparison of tires 255/50 R16
R16
R15 -1
R17 +1
R18 +2