Help mini tub back spacing Question

[HAUK67]

I have a 71 demon with a 3" mini tub and wanta order new rims and tires...I was told by the previous owner i would need to go with a 3.5 " back spacing but very hard to find a rear wheel with that spacing....Anyone running a 4.5" and would this work on my car? Thanks for any input

 

[crackedback]

Best thing to do is take both rear tires off, put axle on jack stands at ride height and drop a pulmbob.

If the axle is a length different that a stock a-body, which it sounds like, you have to measure.

Here's a good link for measuring procedure:
http://www.bigblockdart.com/techpages/wheelspacing.shtml

You could use the current wheel as a baseline. If you are going to a smaller section width tire, it will work ok.

 

[rjsjea]

You really need to measure before ordering wheels......it's really easy on the rear.

It really depends on how wide of a wheel/tire you are going with and the width of your housing.....3.5" backspacing on how wide of a wheel/size of wheel??

 

[HAUK67]

rear wheels on the car now are 15x10 3.5 back spacing looking to put 15x10 4.5 back spacing?

 

[Eric_S68]

The 4.5" BS will move the centerline of the rim towards the middle of car 1"

To get a correct and easily obtained measurement....... Saving you a hassle

1) Floor jack under center of rear, block frt wheels, Jack up.

2) Remove rear tires.

3) Using a piece of string with a weight on end (aka plumb bob)(lightweight fishing string works well with a splitshot or 2) Measure from 3 places, Drop the string from; inside the outer wheel lip, the face of the drum and the inner wheelwhell. mark all 3 spots with chaulk on the ground and get your measurements for width.

Eric

 

[HAUK67]

I will try that this weekend....Thanks