Backspacing

[baggedlsx]

I'm trying to figure out the backspacing these trucks like. I found a set of 20x9 SRT-10 replicas wheels, that are 5x5, with 6.3" backspace. I'm trying to figure out if I'll need to run a spacer or not to keep them from rubbing. I'm planning on a 20/22 combo on the truck, and I love the look of those wheels.

 

[bobfig]

http://www.gmfullsize.com/forum/showthread.php?t=222435

looks like its going to be a 1/2" too far in.

im running some 8" wide with a 4.5" backspace and they are even with the fenders. if they had an extra 1/2 " they would be perfect for tucking if i were to drop it.

not the best pics but enough to get the idea

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[baggedlsx]

Thanks for the link, It's been bookmarked.