I have cragers that are 15 in x 8 in., 5 x 4.5/4.75/5 in. Bolt Circle, 4.25 in. Backspace. What size tires should i get ? I was thinking of going bigger was worrie about rubbing. Any ideas ?

 

With your backspacing being a quarter inch wrong, you may be limited to a 235/60R15 size.

 

Thanks,

I can return the rims. What do you suggest ?

 

If you find a tire store that has a fender rolling tool, you might fit 245/60s. If you get a 4.5" backspacing, a 245 is easy.
Combine fender rolling with 4.5" backspacing, a 255 should work, but will look doofy. If it looked good, everyone would do it.