could someone tell me what backspacing you need for the f body with the 15" weld rims. i need backspacing for the front runners 15x3.5, and for the 15x8's and 15x10's as well. and also what is our bolt pattern? thanks in advance

 

15x8 = 5.5 b/s
15x10 = 6.5 or 7.5 (7.5 needs more inner fender beating)

5x4.75 bolt pattern if my scattered memory is correct.

front runners are usually a fixed backspace,i just looked in jegs and they are fixed backspace,just depends if you want the 3.5 or 4" wheel.

 

The front runner for 3.5 will be 1.75 back spacing with a 5/16 spacer. Also you should check out the wheel and tire section and you might find more detail info or pics.

Vinny

 

This is a 15x10 Pro-Star with a 7.5" backspace. Going to a 6.5 is going to push it out an inch more.... depends how you want it to look.

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