Need information on maximum 1969-72 c20 wheel size and offset

[trucksarecool]

I have tried searching forums first and I found some useful information but not all. So I was hoping someone had an idea. As of now I have a stock suspension 1969 Chevy c20. I am restoring for a lowered and “touring” setup/look. It’s an 8x6.5 bolt pattern for those who don’t know. The questions I have are:
1. Will a 10” wide wheel width work for both the front and back with regard to backspacing/turning?
2. If 10” is too wide, what will work the next width down? 9.5 or 9?
3. An alternative could be 10” on rear and smaller width on front.
4. I know people in other threads say that a neutral/0 offset is best on these trucks but what offset is allowable to go to? In mm. I’m seeing a lot of -24 mm offset options, that is why I’m asking.

Any help or direction or information would be greatly appreciated.
Thanks,
Max

[Mike C]

Wheels should be sized to fit tires. First figure out what size tire you want to run then you can figure out what size wheel would be best.

Typically, zero offset wheels work well on these trucks, but there are not as many lowered wide tired C20’s to search to see what others have run.

IME, the 10” wheel is not the best choice in width for rims over 15”. On my short step I have zero offset 17x8’s in the front (4.5” backspace) and 17x9 in the rear also zero offset (5” backspace). My truck is lowered 4.5”/7” and has disc brake conversion and the wider 70-72 1/2 ton axle width.

I have never measured or heard reference to different housing widths for 3/4 ton trucks so not sure on that. I have owned several but ran 265 75 16 on 16x7 Alcoa’s with 4” bs on my 70 GMC only lowered 1 1/2” in rear with longer shackle.

If you aren’t exactly sure of the definitions of offset and backspace you should Google for an answer.