Ryan from OK saying Hello - tire and wheel fitment - ClassicOldsmobile.com


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Old April 19th, 2017, 07:55 PM   #1
bigrbandit
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Ryan from OK saying Hello - tire and wheel fitment

Hi folks

I have been a long time lurker, finally signed up to post. I have a 1972 Cutlass Supreme that I will be restifying over the next few years. I have been into Oldsmobiles for about 30 years, and know a good bit, but on this I will have some questions. The car right now is a straight body 2 owner 3502bbl/th350/273 open/power Drum brake car that will over the years get:

Paint
4 wheel discs
4bbl/TH2004R
3.90 posi
improved suspension, stock height
The biggest widest wheels I can stuff under without any metal mods.

Coming to you from beautiful downtown Ponca City, Oklahoma, where I am an engineer at a refinery.

Ryan
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Old April 20th, 2017, 03:01 AM   #2
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Welcome to the site, sounds like a plan.
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Old April 20th, 2017, 05:51 AM   #3
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Welcome to the site. We look forward to seeing pics.
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Old April 20th, 2017, 06:56 PM   #4
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Welcome, from the Broken Arrow area of Oklahoma.
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Old April 20th, 2017, 11:00 PM   #5
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Welcome aboard. You didn't say if it's single or dual exhaust. If single plan to install duals as the factory ratings show a 20 hp gain for just that difference.
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Old April 21st, 2017, 05:37 AM   #6
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Welcome Ryan, I am surprised you haven't been asked for pictures! Best of luck with plans your plans. Larry
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Old April 21st, 2017, 06:59 AM   #7
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Originally Posted by bigrbandit View Post
Hi folks

I have been a long time lurker, finally signed up to post. I have a 1972 Cutlass Supreme that I will be restifying over the next few years. I have been into Oldsmobiles for about 30 years, and know a good bit, but on this I will have some questions. The car right now is a straight body 2 owner 3502bbl/th350/273 open/power Drum brake car that will over the years get:

Paint
4 wheel discs
4bbl/TH2004R
3.90 posi
improved suspension, stock height
The biggest widest wheels I can stuff under without any metal mods.

Coming to you from beautiful downtown Ponca City, Oklahoma, where I am an engineer at a refinery.

Ryan
Welcome aboard! Not sure what your tastes are in wheel diameter. If your're going for more of a resto-mod type look i would say 18x8.5F and 18x10 rear will look good with stock height suspension.
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Old April 21st, 2017, 07:05 AM   #8
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I'm actually thinking US mags bandit 18x8 front 4.5 bs with 245 45 18 and 18x9 rear 5.25 bs 275 40 18. Im just wondering if the sidewalls look just a little small. Right now it has 14x7 SS2s all around with 20yr old 215 70 14s that will not clear future disc brakes. I have seen these on the US mags website on quite a few A body cars, even 64-47 which are tighter. The Pontiac guys these and put in the PMD cap. They are also available in 17 as well. The rimsntires website has a good fitment chart of
what actually works.
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Old April 21st, 2017, 07:08 AM   #9
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I'm at work so I don't have pics to upload, but I have been keeping a log of everything I have done to it. I will post as much as people want. Last week I went thru the entire back of the dash, put in a Retrosound Hermosa stereo with USB/BT, 4x10 dual VC in the front, got all of the AC doors working, and all the wiring fixed. It is a single exhaust right now, one of the next steps is the Summit A body 2.5 duals with turbo mufflers.
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Old April 21st, 2017, 08:34 AM   #10
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Originally Posted by bigrbandit View Post
I'm actually thinking US mags bandit 18x8 front 4.5 bs with 245 45 18 and 18x9 rear 5.25 bs 275 40 18. Im just wondering if the sidewalls look just a little small. Right now it has 14x7 SS2s all around with 20yr old 215 70 14s that will not clear future disc brakes. I have seen these on the US mags website on quite a few A body cars, even 64-47 which are tighter. The Pontiac guys these and put in the PMD cap. They are also available in 17 as well. The rimsntires website has a good fitment chart of
what actually works.
Thats a pretty standard fitment. Sidewalls will be fine.Until you get into the wider widths, 40 is still s decent sidewall. The wider wheels will make the 275/40 looked stretched. A 9' wide wheel on a 275 width will provide the sidewall I think you want.

Personally I would do the 18's, then you have no limits on brake options...

Last edited by csouth; April 21st, 2017 at 08:39 AM.
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Old April 21st, 2017, 08:45 AM   #11
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Hers a pic of a 275/40/18 on a 9" wheel
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File Type: jpg SD531030.jpg (327.3 KB, 15 views)
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Old April 21st, 2017, 10:03 AM   #12
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Old April 23rd, 2017, 12:20 PM   #13
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Welcome to the site. You'll get a lot of good info and meet some great people on here.
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Old Yesterday, 03:06 PM   #14
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285/40/18 and 255/40/18
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