X2 on what Rick said. You could outgrow a 24 in a hurry. I know it costs more. You can get a 215/75-16 in a 10 ply, and not worry about it again. Ive had those for 3 yrs now, and very happy. I blew out one tire last yr., and it was from hitting something that came out from a truck in front of me.
They fit fine.