The FINAL Wheel Backspace Thread for 1967-1969 Darts

[19_Dart_68]

Ok, probably not....but,

I guess I just need to know what BS is going to work with my Factory A-body 8 3/4, mini tub and spring under frame relocation...
Will a 15x10" wheel with 7.5" BS work with a 12.5" cross section tire?
Planning on moving the axle back about .75" as well so I can use a 29" diameter tire if I need to.

 

[33IMP]

I can't tell you for sure.... but that sounds about right.
I have a pair of factory-made centerlines that look like they were made for your exact situation. 10 1/2x15, 7 1/4 backspace, 5 on 4 pattern. They have been double drilled to 5 on 4 1/2. They are basically a 15x7 front half, 15x14 back half.

 

[19_Dart_68]

I can't tell you for sure.... but that sounds about right.
I have a pair of factory-made centerlines that look like they were made for your exact situation. 10 1/2x15, 7 1/4 backspace, 5 on 4 pattern. They have been double drilled to 5 on 4 1/2. They are basically a 15x7 front half, 15x14 back half.

View attachment 1716093728

View attachment 1716093729

That's pretty cool. How much room do you have between the inside of the tire to the rear spring?

 

[33IMP]

I haven't mounted them yet, haven't moved the springs under my Barracuda. The wheels shown on the car are normal 15x8 1/2 with 4 7/8 b.s. I'm using a .300 spacer to get the slicks away from the springs, so a 4 1/2 bs would be right. So a 3" spring move should need 3" more backspace. (And the blue car has had the rear moved back an inch, too)
IF you have mini-tubbed it along with the spring move, the wheel tire combo you suggested should be close.

 

[sabre67]