Comparison of tire sizes 205/50 R17 and 235/40 R17
205/50R17
205
Tire width 
50
Profile height 
R17
Tire diameter 
500
RPM per km 205mm103mm637mm2001mm
205
50
17
235
40
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 637 | 620 | -17 (-2.7%) | ||
| Width, mm | 205 | 235 | +30 (+14.6%) | ||
| Circumference, mm | 2001 | 1947 | -54 (-2.7%) | ||
| Profile height, mm | 103 | 94 | -9 (-8.7%) | ||
| RPM per km | 500 | 514 | +14 (+2.8%) | ||
| Clearance change, mm | -9 | ||||
| Result: | The diameter differs by -2.7%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 97.3 |
| Difference (km/h) | -2.7 |
Sizes for comparison of tires 205/50 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2
Sizes for comparison of tires 235/40 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2
