Backspacing question for 8 lug C20

[71threequarterton]

I just got a 71 C20 with aluminum 16.5 wheels on it which I'd like to replace. I searched the forum here and I like the look of the 265/75/16 on 16x8 combo up front. So for you guys who are running this setup, can you tell me what your backspacing is? Thanks.

[Sicklajoie]

I've got 16 x 7 F#rd van rims that have a backspace of 4 3/4"

[71threequarterton]

That's a nice looking fit. Are those 265/75/16 tires all the way around?

[Sicklajoie]

Originally Posted by 71threequarterton

That's a nice looking fit. Are those 265/75/16 tires all the way around?

Yes they are.

[PepperTreeGarage]

These wheels came off of my Brother-in-Laws '88 Suburban. They are 16x6.5 with 4.5 back spacing running 245/75/16.

[Mike C]

I ran 265 75 16 on my 70 GMC 2500 on Alcoa 16x7 rims and that was a good fit. The backspacing was 4" I believe which would be zero offset on a 7" rim.

In general, zero offset a good fit on these trucks all around. My '69 short step has 17x8 4.5" bs front and 17x9 5" bs rear. In both instances this is zero offset.
That means the wheel mounting surface (WMS) is equal distance from the front of the rim and back of the rim.

Wheel width is measured between the beads but backspace is measured from the actual overall width of the rim which is usually 1/2" or close enough to use that #.

Offset is the distance that the WMS is displaced from the centerline. Positive offset is what you see on front drive cars where there is a lot of backspace relative to width while negative offset is what you see on most rear vintage rear drive cars.

[71threequarterton]

Cool. I appreciate the replies. Are you guys both running the Dana 60 rearend?

My back tires are BFG 33/12.5/16.5. I think they look just right so I was going to just try to find the equivalent in a 16" tire for the back.

It's the front that don't look right. I want to get the look I'm looking for but want to make sure they don't rub. Right now I've got these front tires which read 9.5/16.5 but I can't find the diameter marked anywhere on the tire. I measured them and they are around 29", which looks a little too small in my opinion.

[PepperTreeGarage]

Originally Posted by PepperTreeGarage

These wheels came off of my Brother-in-Laws '88 Suburban. They are 16x6.5 with 4.5 back spacing running 245/75/16.

Yes it has the Dana 60 rear end

[Sicklajoie]

I'm running an Eaton rear.

[Mike C]

265 75 16 are 31.6" in OD give or take a little. They have a 10.4" section width. A 255 85 16 is 10" section width and 33" tall. A 285 75 16 is 11.2" section and is 32.8" tall.

I found the 265 75 16 an excellent fit on my C2500 big block truck with disc conversion and the Dana 60 on leafs in the rear. I ran ECE 1 1/2" lowering shackles in the back for a more level look without changing anything else.

[Acorn]

I am using these wheels https://www.summitracing.com/parts/w...0804/overview/

16x8 with 4" backs spacing.
265/75/16 all the way around. (Measure right at 31" once installed)
New 3/4 springs all the way around.
Very happy with the look and drive.

[Acorn]

This is the only side view pic I have to give you an idea how far they stick out.
Hope this helps

[Mayo]

I run these 16x8s with 265/75/16 tires and 4.25 backspacing

[71threequarterton]

Originally Posted by Acorn

I am using these wheels https://www.summitracing.com/parts/w...0804/overview/

16x8 with 4" backs spacing.
265/75/16 all the way around. (Measure right at 31" once installed)
New 3/4 springs all the way around.
Very happy with the look and drive.
Attachment 1561504

Acorn, those Wheel Vintiques are the ones I've been looking at. I want the black powder coated - I think they'd look cool in black with those same hubcaps that you have Did you find those hub caps on ebay or did you already have them? Thanks guys!

[Acorn]

They come powder coated black. I painted mine white. Before the paint even dried, I remember thinking 'dang, maybe I should have left them black...just to see what they looked like....) Oh well, it's just a work truck.
I have bought,sold,traded, to many parts over the years to remember where I got the hubcaps from. I do know that the price of them seems to be going through the roof lately so I usually take them off whenever I go to the big city so they don't get stolen.