2WD Blazer/Jimmy Wheel Backspacing Question

[NZCP]

Hi there

I want to order some wheels for my Jimmy that I have bought.

What backspacing do I order?

I am in New Zealand so I have no way of measuring this.

I look forward to your replies.

Thanks
Clive

[Big Block]

What year blazer do you have?

[NZCP]

1979- I need to get this sorted out so I can order my wheels and get them into the truck before it ends up in a container.

[milehightoyz]

backspace depends on alot of things, width of wheel? size of wheel? stock height? slammed? tire size?

[NZCP]

Probably looking at either 15 or 16" X 8

Suspension has been dropped 3 inches

Tires will be 235 wide

[milehightoyz]

if you used 3" drop spindles and want to run 15's you are gonna need a really negative offset (3" backspace or less) or you are going to need to grind your lower control arms down. 16x8 or larger you should be fine with 4"-4.5" backspace or so.

[NZCP]

It currently has 15 x 8 Ralley's on but I want to put Eagle Wheels series 203 which at 15 X 8 has 18mm negative offset and 3.75" backspacing.
What do you think?
i know the springs have been changed but am unsure if it has drop spindles.

[N2TRUX]

Originally Posted by NZCP

....
i know the springs have been changed but am unsure if it has drop spindles.

Turn your wheels all the way one direction and take a look. You might need a flashlight, but you should be able to see the spindles. Most aftermarket manufacturers will cast their name in the spindle. If they are stock, they should have GM on them somewhere....

[mcmlxix]

Bringing this back up. Looking at either 18" or 20" wheels. (NOT 18 front / 20 rear)
18x9 with 4.5" back spacing
20x9 with 3.75: back spacing