1966 c10 backspacing?
 

ok question about steel wheel backspacing. I currently have factory 6 bolt 15 x 8 ralley wheels from a 1984 chevy squarebody on my 1966 c10 with factory drum brakes that I am not changing to disc anytime soon. The backspacing is 4". I am looking at wheeltiques 6 bolt 15 x 7 or 15 x 8 steel wheels with the nubs for the original like hubcaps.The problem is the current ralley wheels with 4" backspacing are @ 1\4 from the tie rods currently. The wheels I am looking at seem to only come in 4.25" backspacing. Who has done this? Did things fit ok? Do not want to spend $ to find out I have fitment issues. Thanks

Re: 1966 c10 backspacing?
 

you could simply use a .25 spacer and you should be fine

Re: 1966 c10 backspacing?
 

Wouldn’t the 7” wheels be the way to go? Pick up 1/2” on either side for 8-7” and give up 1/4” add’l backspacing, so should give you 1/4” add’l clearance. I’m looking to do the same thing so curious if someone can confirm my numbers..

Re: 1966 c10 backspacing?
 

I would not utilize 1/4" spacers on OE 6-lug studs. If they're replaced w/something longer & stronger, sure.

Check w/Wheel Vintiques. If you order directly from them, you can (could @ one point in time) select the back-spacing dimension within a select range per size of the wheel @ an added cost.

I have 16x6 & 16x8" 8-lug 62-series 'OE' steel wheels on one of my trucks. Both sizes I spec'd my back spacing. The caveat is if you order & pay for 'custom' back-spacing, the wheels are yours & not returnable so your math needs to be on-point.

Re: 1966 c10 backspacing?
 

I'm running 20 inch wheels, 8" wheels with 4.50" backspacing in the front, and
9" 5.00 backspace in the rear.
NO problems anywhere

Re: 1966 c10 backspacing?
 

So that others not in the know understand, this is apples to oranges here.

A 20" wheel will allow greater clearance @ obstacles like tie-rods or impact on the scrub-line vs a smaller diameter wheel. The physical placement of the wheel relative to the body is where they're similar.