optimum back spacing for a 7" front wheel?

[Strawdawg]

Seems like it should be 4", but, I recall seeing 4.25" elsewhere.

[ShelbyDogg]

4" is right. Some measure to the outside lip and get 4-1/4.  Backspacing is usually measured to the inside edge where the tire seats. Stick with 4" and you'll be fine.

[Strawdawg]

Thanks, I appreciate it

[ShelbyDogg]

No problem.   Just be aware that alot of these aftermarket wheels have a 3-5/16" backspacing and if you put on a 235-60-15 on one of those, your tire will rub the fender around turns and  while turning into the "driveway bump"  I run the 15x7 Rallye with a 235-60 in the front and it never rubs anything. I had the 3-5/16s before and HATED them.

But I like my cars low though. The tops of my tires are inside the fender and not jacked up like some of these guys have them.

[Strawdawg]

I am with you

that much offset also puts a pretty good load on the outer bearing