I have two almost-new trailer tires in size 8-14.5. They are NOT the notorious mobile home tires, but marked Trailer and Low Boy. I'm wondering about the "14.5" bead diameter. On my 295/75R22.5 big-rig tires, I believe I know that the ".5" is code for tubeless. The actual bead diameter is the same even 22 inches as in the days of inner tubes. Correct? So.... Does the "14.5" mean the same thing? Does the ".5" just mean tubeless? (They also have the word tubeless on them.) Would those tires fit a 14" car rim? (Don't worry about the strength of the car rim -- I'm building a parade float.) Appreciate the help!