Biggest BF Goodrich Drag Radial

[BUICKTR]

What is the biggest tire I would put on my 15x8 Weld Pro Star with a 3 1/2 back spacing. My fender lip has already been rolled up. I have been thinking of a 325/50/15. Thanks!

 

[UNGN]

not even close.

The only way they'll fit is with a frame notch and about 5" backspacing (they are too wide for an 8" wheel, anyway)