Comparison of tire sizes 205/45 R17 and 205/40 R17
205/45R17
205
Tire width 
45
Profile height 
R17
Tire diameter 
516
RPM per km 205mm92mm616mm1936mm
205
45
17
205
40
17
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 616 | 596 | -20 (-3.2%) | ||
| Width, mm | 205 | 205 | 0 (0%) | ||
| Circumference, mm | 1936 | 1872 | -64 (-3.3%) | ||
| Profile height, mm | 92 | 82 | -10 (-10.9%) | ||
| RPM per km | 516 | 534 | +18 (+3.5%) | ||
| Clearance change, mm | -10 | ||||
| Result: | The diameter differs by -3.2%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.7 |
| Difference (km/h) | -3.3 |
Sizes for comparison of tires 205/45 R17
R17
R16 -1
R18 +1
R15 -2
R19 +2
Sizes for comparison of tires 205/40 R17
R17
R16 -1
R18 +1
R15 -2
