A Falken RT660 295/40-18 has an overall diameter of 27.4"
Even if the face of an 18" rim measures 20" that still leaves 7.4"/2 = 3.7"
That calculator doesn't give you visible sidewall height It gives you available sidewall height on which you can put a sticker on successfully.
__________________
Donny
Support your local hot rod shop!
|