Back-space question

[HemiPar]

Hey all. Hope you are having a great morning. Polishing the car today and thinking of new wheels. But I can't remember how to measure the back-spacing. Is it from the lip or the tire seat? Thanks.

 

[rumblefish360]

Without the tire on the wheel would be easiest, but, a striaght edge acorss the wheel, not tire and a tape measure to the bottom is it.

 

[78kitcar]

Rumblefish is right again..Heres a pic of what rumble said http://www.vintagewheelworks.com/tech-backspace.php

 

[Swinger4me]

This may help.

http://www.4wheelparts.com/tire-wheel-package-guide/wheel-offset-backspacing.aspx



__________________
'73 Dart Swinger 360 4 speed

 

[HemiPar]

Thanks guys. Looking at getting new wheels but what I like only has 4"bs. The wheels I have now are cop wheels 15x7 with 4 3/4bs.

 

[340_dart_power]

I have the same issue; I'm replacing the small bolt pattern with the 5X4&1/2 large bolts and need to figure out what size tires and wheels will fit on my '71 Dart GT.
I've been looking at American Racing 15" wheels and T/As but until we have the new disc brakes installed on all four corners I'm reluctant to order anything on the assumption they'll fit.