Widest rim in an A?

Badart said
I am doing full tubs on my dart. Cutting back to the frame rails I can fit a 325/60/15 BFG drag radial mounted on a 12" rim in there with about 1" on each side. I am in the process of narrowing the rear to make it work.

This all depends on if you are planning to put Golf Clubs, Cooler, luggage, wife and kids in the back for vacation somewhere.:-D