Boss 338 Front Wheels 20x8.5 -- Which Offset?

[Crummins]

My buddy has a 1990 Chevy C1500 that we lowered with 2/4 Belltech kit.

He is going to put Boss 338 Wheels on it. 20x10's in the rear and 20x8.5's in front

They offer the Boss 338 in two offsets for the front +2 and +14.... which one will be correct for these trucks?

Thanks in advance!

 

[someotherguy]

+14 all the way. +2 will rub fender lip bigtime unless you run a rubber band on it.

Richard

 

[JWall]

+14 all the way

Agreed.

My fronts are the 20x8.5s with the 5.25 backspacing & rears are 20x10 w/ 5.5 bs.

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[Steve's Chevy]

Agreed.

My fronts are the 20x8.5s with the 5.25 backspacing & rears are 20x10 w/ 5.5 bs.

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What's the tire size in the rear? I'm asking because I'm told the 5.5" bs won't work . It needs more on a 10" wheel.
Thanks

 

[someotherguy]

Yeah wondering myself, in the gray 20x10 only 6.225" is offered and it fits great; hard time imagining 5.5" but I guess it's not THAT much difference.

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Richard

 

[JWall]

What's the tire size in the rear? I'm asking because I'm told the 5.5" bs won't work . It needs more on a 10" wheel.
Thanks

275/35/20. My fender lips are rolled but I've never had them rub anywhere. I hauled a bunch of stanchions, floor jacks, etc from the indoor show where those pics where taken & it was weighted down so that it was tucking tire & still no rubbing anywhere.

Another angle...

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[Sac12]

+14 all the way.. The wheel shop ordered the +2 for mine, only reason it tucks is because of the camber.

 

[someotherguy]

275/35/20. My fender lips are rolled but I've never had them rub anywhere. I hauled a bunch of stanchions, floor jacks, etc from the indoor show where those pics where taken & it was weighted down so that it was tucking tire & still no rubbing anywhere.

Another angle...

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I'm wondering if there might be a slight width difference between a 10 bolt and my 14 bolt SF (my truck is a 2500LD with redrilled axles), I don't think so, but it might explain it. I've rolled mine a tiny bit, too; but I did it back when I had different wheels on that sat farther in (8.5's with a 5.5" backspace) "just in case" it got sideways enough while driving crazy.

Richard