It can be done: stock B-body 295/55R15 on 15"x10" wheel
#1455509
06/19/13 09:06 PM
06/19/13 09:06 PM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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A few weeks ago I was asking around here about the widest wheel/tire combo that I could get on my '68 Road Runner with stock leaf spring location, axles, etc. With 5.5" back-spacing on my 15" x 10" steel wheels, I was able to get 295/55R15 tires underneath the car with no issues. That's a 10.9" tread/12.1" section tire...just a heads-up for any one looking for wheel/tire combos that will work (at least, for '68/'69 Road Runners). I'll try and post photos tomorrow. 
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: It can be done: stock B-body 295/55R15 on 15"x10" wheel
[Re: 1968RR]
#1455510
06/19/13 09:35 PM
06/19/13 09:35 PM
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Joined: Jan 2003
Posts: 4,437
Omaha Nebraska
Brian_wo
master
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master
Joined: Jan 2003
Posts: 4,437
Omaha Nebraska
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I have 28x12.5x15s on mine
who is that guy?
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Re: It can be done: stock B-body 295/55R15 on 15"x10" wheel
[Re: jcc]
#1455513
06/20/13 12:03 AM
06/20/13 12:03 AM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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Quote:
First I've have heard of a 295/"55"-15 tire 
Usually referred to as 28x12.5x15: http://www.summitracing.com/parts/mtt-3755r/overview/
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: It can be done: stock B-body 295/55R15 on 15"x10" wheel
[Re: SCATPK]
#1455514
06/20/13 12:04 AM
06/20/13 12:04 AM
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Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
1968RR
OP
top fuel
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OP
top fuel
Joined: Nov 2005
Posts: 1,943
San Angelo, Texas, U.S.A.
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Quote:
Well I have squeezed a 325/50/15 on a 10" wheel with 5.5 backspace under my 68 gtx without issue. I currently am running 315/60/15"s on the car with the same wheels with a 5.5 backspace. I will get a little rub with 4 guys in the car and hitting a good dip in the road. Here is a picture of the 325/50/15`s under the car.
That stance is perfect. Nice car, too!
"When I'm in a slump, I comfort myself by saying if I believe in dinosaurs, then somewhere, they must be believing in me. And if they believe in me, then I can believe in me." - Mookie Wilson
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Re: It can be done: stock B-body 295/55R15 on 15"x10" wheel
[Re: 1968RR]
#1455515
06/20/13 07:35 AM
06/20/13 07:35 AM
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Joined: Jun 2005
Posts: 5,172
Western Md.
skicker
"The Champ"
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"The Champ"
Joined: Jun 2005
Posts: 5,172
Western Md.
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My wheels were only able to be bought in a 9.5 inch width with 5.5 in backspace. I was able to run a 275-60-17 tire with no issues. I did have to add a 3/4 solid spacer in front of the leaf spring hangers to push the rear back far enough to keep them from hitting the 1/4 panel. The tires have a 10" tread width and about 11 1/2" section width. the advertised diameter was 29.98" but with a tape measure they appear to be a tad over 30". The 70 has large rear wheel openings and I wanted the opening as full as possible. It worked out good. I don't know about 68-9 RR wheel openings but I know they won't go under a friends 68 Coronet.
...FAFO...
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