Posted By: stateroadhog
wheel backspacing on b-body - 04/30/10 12:51 AM
I want to have my steel wheels widein to 8 inches on the rear of my 70 roadrunner with dana rear end. what should the back spacing be set at?
wheel backspacing on b-body
Posted By: StealthWedge67
Re: wheel backspacing on b-body - 04/30/10 01:00 AM
Typically, for a 8" wheel, a squared up backspace would be about 4-3/4" (factory steel 7" wheels are @ 4-1/4") A 70 should have no problem fitting just about anything that will fit on a wheel in that neighborhood.
Posted By: Kern Dog
Re: wheel backspacing on b-body - 04/30/10 06:01 AM
Why not take the wheels out to 10 inch? I fit 18x10 rims in my 70 Charger without cutting anything. They have 4 3/4 inch backspacing. 
Posted By: PAINT IT BLACK
Re: wheel backspacing on b-body - 04/30/10 02:59 PM
Quote:
Why not take the wheels out to 10 inch? I fit 18x10 rims in my 70 Charger without cutting anything. They have 4 3/4 inch backspacing.
Passenger tire size choices are lacking for a 15X10 wheel if you don't want drag radials. You are stuck with 295/50R15 tires and those are less than 27" tall.
Btw, Don't square those 8" wheels in the wheel well. Put all the extra width on the front side of the wheel and fill in some of that gap.... will look much better. So 4.25 bs in that case.
I had some 8.5" wheels on the back of my '70 Bee that had a 3.75" bs and they looked quite nice (going to 10" now though).
Posted By: DoctorDiff
Re: wheel backspacing on b-body - 04/30/10 03:12 PM
Mickey Thompson makes Sportsman SR street radials in 28 x 12 x 15.
Hoosier makes Pro Street radials in 29 x 12.50 x 15.
Both tires fit 10" wheels nicely.
Hoosier makes Pro Street radials in 29 x 12.50 x 15.
Both tires fit 10" wheels nicely.
Posted By: R/T1968R/T
Re: wheel backspacing on b-body - 04/30/10 03:40 PM
Try this...its for a Charger but should help!
http://vexer.com/68rt/old_outdated_badly_coded_old_old_old_wheelguide.html
http://vexer.com/68rt/old_outdated_badly_coded_old_old_old_wheelguide.html
Posted By: HealthServices
Re: wheel backspacing on b-body - 04/30/10 04:38 PM
What size tire are you planing to use?
Posted By: AndyF
Re: wheel backspacing on b-body - 04/30/10 04:56 PM
You might be able to find someone in the local area who has a tape measure who could help you measure the wheel wells. That is the best way to figure out how wide the wheels can be and where they should be centered.
Posted By: 440challenger
Re: wheel backspacing on b-body - 04/30/10 11:42 PM
probably cheaper just to buy new 8inch wheel vintiques 4.5 inch bs
Posted By: HealthServices
Re: wheel backspacing on b-body - 05/01/10 06:31 AM
The only problem with wheel vintiques is, they are really heavy
Posted By: Kern Dog
Re: wheel backspacing on b-body - 05/01/10 07:18 AM
Heavy? So what? The mopar engines make plenty of torque anyway.
The Heavier wheels wont make that much difference in acceleration, but they will allow a factory appearance and they are strong.
The Heavier wheels wont make that much difference in acceleration, but they will allow a factory appearance and they are strong.
Posted By: Anonymous
Re: wheel backspacing on b-body - 05/01/10 11:56 PM
Quote:
The only problem with wheel vintiques is, they are really heavy
Wheel Vintiques 15X8'S = 27 lbs. apiece.
