Got my first notch update picture.
Goal = run 325/50/15 Street R
There's 3" of space with these wheels/tires/aluminum drums...
GN 15x10 with 4.5bs (5.5/4.5)
275/60/15 = 11.1 (section width)
11.1 - 10 = 1.1 /2 = 0.55
6.05 & 5.05 (offset and backspacing)
I have 2.25" BS to fill before a possible frame rub issue with a 325/50/15 Street R.
To fill up that space I can widen the wheels..
15x11 with 5.5bs (5.5/5.5)
325/50/15 = 13.2 - 11= 2.2/2 = 1.1
6.6 & 6.6
Not enough BS
If I make the wheels 15x11.5 with 6 bs (5.5/6)
325/50/15 = 13.2-11.5= 1.7/2 = 0.85
6.35 x 6.85
Better but still not enough is filled up
15x12 6.5bs (5.5/6.5)
325/50/15 = 13.2-12 = 1.2/2 = 0.6
6.1 x 7.1
6.05 & 5.05 (275 spacing)
15x10 w 5.5bs is 6.1 x 7.1 so that's the same.
weldcraftwheels.com
These guys will widen my wheels, unfortunately Centerline doesn't offer the Autodrag with the backspacing I need and 15x12 w 6.5"bs isn't a common size with many wheels.