Wheel backspacing and bore?

[Ruger_556]

I've exhausted google on this one and can't find the answer. On a c1500 what are the stock backspacing and center bore measurements? Looking at US Wheel Stealth series 204 and it specs at 3.75 backspacing with 3.3 center bore. It's a 15x7.

 

[95C1500]

stock bs is 6". I think center bore is 87.1mm (not 100% on that last one though)

 

[Ruger_556]

Holy c___.... 6" backspacing on the factory 7" wheels?

 

[95C1500]

that's what the ol interwweb came up with. It's also been said on here a few times if I'm not mistaken.

 

[Ruger_556]

So I measured from the front edge of the wheel lip to the center of the wheel and came up with 3"... Knocking off a half inch for the wheel lip gives me a backspace of 4.5 inches correct? Does this sound right? The factory alloy's of Scott's must be different... I was to lazy to pull the wheel off and measure from the back but this should work right?

 

[Ruger_556]

Someone on here has to know...