Comparison of tire sizes 225/40 R18 and 225/35 R18
225/40R18
225
Tire width 
40
Profile height 
R18
Tire diameter 
500
RPM per km 225mm90mm637mm2002mm
225
40
18
225
35
18
| Parameters Sizes | Old | New | |||
|---|---|---|---|---|---|
| Diameter, mm | 637 | 615 | -22 (-3.5%) | ||
| Width, mm | 225 | 225 | 0 (0%) | ||
| Circumference, mm | 2002 | 1931 | -71 (-3.5%) | ||
| Profile height, mm | 90 | 79 | -11 (-12.2%) | ||
| RPM per km | 500 | 518 | +18 (+3.6%) | ||
| Clearance change, mm | -11 | ||||
| Result: | The diameter differs by -3.5%. | ||||
| Speedometer reading (km/h) | |
|---|---|
| Real speed (km/h) | 96.5 |
| Difference (km/h) | -3.5 |
Sizes for comparison of tires 225/40 R18
R18
R17 -1
R19 +1
R16 -2
R20 +2
Sizes for comparison of tires 225/35 R18
R18
R17 -1
R19 +1
R16 -2
