Well scrunching the 245’s onto a scrawny 5.5” wide rim plays a big part in that too. The section width will be significantly reduced on that narrow of a rim. Put them on the proper width rim (7” to 8.5”) and you wouldn’t have as much room. And even then the backspace still plays an important part. The tire will fit if the backspace is right, but a lot of those old Cragars like that OP is running don’t have the best backspace numbers.
