The Stovebolt Site Forums The Parking Lot '60-'66 Trucks 6066 backspacing??

This is the info from a Chevy data sheet. I'm gonna assume that a 1/2 GMC used the same. Mine is a Burb but they put them on 115" PU frames.

Tires: Five tubeless 6.70-15/4PR
Wheels: five 15” x 5.0”; attachment, 6 studs on 5 1/2” circle.

Anyone know what the back spacing was on stock rims and did they have the bumps for the hubcaps?

Thanks

Anyone know what the back spacing was on stock rims and did they have the bumps for the hubcaps?

Here's a source for the first part.
https://www.rsracing.com/tech-wheel.html
And yes and no. It is generally agreed that 1961 was the first year for "nubs" on wheels to allow the new style-modern type hubcaps. That is for 1/2 ton trucks. 1960 1/2 tons would be the last year for the clip type wheels and caps.
You ask loaded questions there, dude!

If you have a 66 it should have a 5.5 inch wide rim.
Backspacing on those are 3.75 inches.

Where did you get that info. The only thing that I have been able to come up with is this spec sheet that says they were 15"x5". Not trying to argue, just trying to get correct info. Thanks

http://i12.photobucket.com/albums/a205/gvdobler/specs66D.jpg

My 65 c10 came stock with 5.5" wide wheels. Not sure but think 62 had 5" wide wheels. What year does your pdf refer too.

Well therein lays the problem. I don't know what year it is. It looks to be one of 6066 years. Documentaion is hard to come by. GMC seems even harder.

Thanks, I'll work with what you gave me.