Rear Rim BACKSPACE 72 Road Runner, Help
#1504345
09/19/13 12:34 PM
09/19/13 12:34 PM
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Joined: Dec 2004
Posts: 1,554
DC, MD Suburbs
440PURSUIT
OP
pro stock
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OP
pro stock
Joined: Dec 2004
Posts: 1,554
DC, MD Suburbs
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Ready to Order a Set of Rear Rallyes for my 72 Clone.
Leaf Springs in Stock location.
Will 15x10 w 5" backspace work?
How much tire?
What are you using?
Last edited by 440PURSUIT; 09/22/13 08:12 AM.
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Re: Rear Rim offset 72 Road Runner, Help
[Re: 440PURSUIT]
#1504346
09/20/13 12:05 AM
09/20/13 12:05 AM
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Joined: Sep 2003
Posts: 1,168
Vancouver, WA
MoparMarq
super stock
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super stock
Joined: Sep 2003
Posts: 1,168
Vancouver, WA
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Same car. www.vintagewheelworks.com V45s. 17x8 front. 18x9.5 rear. Not absolutely positive on backspacing other that it was the standard offset offered at the time (they offer two different offsets on that rim now). Pretty sure it is 5.5" backspacing. Tire is 275/40-18. (Should have gotten bigger tire - 285/45-18, but it wasn't offered in that brand/model tire.) 1" clearance to spring on passenger side. 1-1/8" clearance to spring on driver side. Factory spring location. Plenty of clearance on fender, but the lip is rolled.
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Re: Rear Rim offset 72 Road Runner, Help
[Re: 440PURSUIT]
#1504347
09/20/13 10:03 AM
09/20/13 10:03 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Ready to Order a Set of Rear Rallyes for my 72 Clone.
Leaf Springs in Stock location.
Will 15x10 w 5" backspace work?
How much tire?
What are you using?
Chris I'd think so. I have 15x9" w/ 5" backspace on my charger. Doesn't the 72 have more BS available?
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Re: Rear Rim offset 72 Road Runner, Help
[Re: Mr.Yuck]
#1504348
09/20/13 10:33 AM
09/20/13 10:33 AM
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Joined: Nov 2003
Posts: 12,495
Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 12,495
Western Colorado High Desert
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5"-5.5" usually works on a 71/2B but I'd measure from the drum flange where the rim sits back to the leaf springs on both sides just to be sure.
Also we are talking back spacing, not offset. Two different things.
Also be sure to allow for the tire side wall which can vary depending on if your running 15" or 20" rims and tires.
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: Rear Rim offset 72 Road Runner, Help
[Re: Mr.Yuck]
#1504349
09/20/13 10:35 AM
09/20/13 10:35 AM
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Joined: Nov 2003
Posts: 12,495
Western Colorado High Desert
moparmarks
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 12,495
Western Colorado High Desert
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Oops, see your running 15" which have more side wall sticking out.
72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, . Moparmarks Parts & Restorations Desert Mopar Metal Grand Jct. CO 970-261-7039 http://moparmark.com/motormangj@gmail.com
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Re: Rear Rim BACKSPACE 72 Road Runner, Help
[Re: 440PURSUIT]
#1504351
09/22/13 07:51 PM
09/22/13 07:51 PM
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Joined: Feb 2004
Posts: 7,196
Harrisburg, Pa.
screamindriver
master
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master
Joined: Feb 2004
Posts: 7,196
Harrisburg, Pa.
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Don't take any computor screen generated measurements as gospel...There's just too many variables like spring sag,rear bushings, rear housing accuracy{as in side-to-side} which is never the same on each side... Get{borrow} a wheel, preferably as close to the size you want to add ...Measure the backspace,width on the rim for the initial fitting...See how it fits then you can figure out which way you need to go to center the wheel where you need it...There's going to be a tight side{left or right}to the quarterpanel lip so find it and make sure the wheel/tire combo will clear... Alot of tire manufacturers list the cross section width to help figure the sidewall bulge... It takes some homework but the results are worth it in the end... Here's a pic of a 10 inch rim that fits nicely in the wheelwell of a 73 road runner The tire is a mickey thompson with a 12 inch cross section...I spent alot of time measuring to make sure it was going in there ... 
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