Comparison of tire sizes 225/45 R18 and 235/40 R18

225/45R18
225 Tire width
45 Profile height
R18 Tire diameter
483 RPM per km
225mm101mm660mm2073mm
225
45
18
235
40
18
Parameters Sizes Old New
Diameter, mm660645-15 (-2.3%)
Width, mm225235+10 (+4.4%)
Circumference, mm20732027-46 (-2.2%)
Profile height, mm10194-7 (-6.9%)
RPM per km483493+10 (+2.1%)
Clearance change, mm-8
Result:
The diameter differs by -2.3%.
Speedometer reading (km/h)
Real speed (km/h)97.8
Difference (km/h)-2.2

Sizes for comparison of tires 225/45 R18

R18
R17 -1
R19 +1
R16 -2
R20 +2

Sizes for comparison of tires 235/40 R18

R18
R17 -1
R19 +1
R16 -2
R20 +2

Ads by size 235/40 R18