Thanks for the come-back CarlC, I have L60-14 bias-ply tires (18 years old) on the back now on old Fenton "Slotted Mags". They are 14" x 9" w/ 3.75 backspace. I know the section width is right at 12" for this particular brand of tires, and they are "big". I've raised the back up with overload springs, (nothing out of the ordinary) which makes for what I consider a good "hot rod" rack. I want to run the modern equivalent in either 16" or 17" and am not too concerned with my car looking "jacked up" in the rear. I do, however want maximum width "foot-print" for straight line accelleration. I guess being a "child of the 60's has put me in a time warp.