Tire clearance

Thanks TXOval for the info
Right now I mocked up a M/T 255/60/15 on a US mag 15/7 with a 5 on 4 bolt pattern with 3.80 back space and 5mm negative offset and have about 1/8in clearance between fattest part of the tire side wall and 1in between tire and spring everything is stock except for the springs which are 6 leaves with 3in arch
Now I need to try it out when the weather breaks