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Author Topic: 15 inch rims on '73 firebird  (Read 5458 times)

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boneman

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15 inch rims on '73 firebird
« on: March 26, 2007, 04:25:53 PM »
I recently purchased a '73 firebird and the tires have dry rot.  It still has the original 14 inch rally wheels.  I am having a problem finding 14 inch performance tires for it. Right now it has 235/70/14 on it, but I can't find anybody that still makes that size tire.  Will 15 inch wheels with 235/70 tires fit on the stock body?  Thanks for your help.
« Last Edit: March 26, 2007, 05:21:30 PM by firebirdclub »

T/A JLK

  • Firebird & Trans Am Club Tech Staff
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Re: 15 inch rims on '73 firebird
« Reply #1 on: March 26, 2007, 07:39:03 PM »
Hi:
The Dreaded Dry Rot ///
Hay /// Join the Club; Vintage Tire’s are a little hard to find, I’m looking for tires for my ’85 T/A !
However in your case you may have luck!
Try  “The Paddock Performance & Restoration Parts”
           7565 .S. State Rd. 109
           P.O. Box 30
                           Knightstown, IN. 46148-0030 (USA.)
        {  www.paddockparts.com  }  or 1-800-428-4319

They have both vintage Good-Year and Firestone Tires that are for 14” and 15” rims and they carry 60 & 70 series Tires you may want to check it out!!


Hope This Can Be Of Some Help.

                                                   Justin K.
« Last Edit: March 26, 2007, 07:40:44 PM by T/A JLK »
I am a NFTAC, Member and I was at one time an auto mechanic working for a local GM dealer here in my home town back in the mid-to late '80's now  I currently enjoy working on my own Pontiac's especially on my '85 T/A // making maintenance repairs, repairs, modifications and performance modifications I also enjoy meeting and /or talking to other Firebird & T/A owners an get into technical debates;hopefully just as long as the debate's doesn't go into a to heated argument.

boneman

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Re: 15 inch rims on '73 firebird
« Reply #2 on: March 27, 2007, 10:00:14 AM »
Thanks for your  help. I will check it out.

mithral7

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Re: 15 inch rims on '73 firebird
« Reply #3 on: April 22, 2007, 09:40:59 PM »
FYI:  1973 Firebirds with 14x7 rims.

They came with F70-14 (poly glass recommended).

Current matching (recommended) radial codes are:
215/70R14
or
235/60R14

Depending on what shock absorbers you have, you may get a better ride out of Classic Poly Glass F70-14s.  (Kinda expensive now-a-days)

I run 205/70R14 or 215/70R14 BF Goodrich Radial T/A on my 1973 Formula 455 with 14x7 Rally II rims.  They ran rough with OEM shocks tuned for Poly Glass.  Just upgrade to a reputable newer shock and you should be okay running newer radial tires.

Stick close to the tire sizes noted above and you'll get the best mix of street performance.

mithral7

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Re: 15 inch rims on '73 firebird
« Reply #4 on: April 22, 2007, 09:49:33 PM »
For 73s that came with 15 inch rims.

F70-15 or G60-15 recommended.

Again, in the 215/70R15 or 225/60R15 ranges.

235/70R15 are just a step bigger and should work fine.  However, the bigger the tire the harder it works your front steering mechanisms, without appreciable increase in performance.

If you do have the original Rally II 14x7,
get them repainted and mount 215/70R15 BF Goodrich Radials T/As on them.  The old steel Rally IIs will perform just as well as anything else.  And you keep that Old-School Muscle look that is so unique to these rims.
 

National Firebird and Trans Am Club Message Board

Re: 15 inch rims on '73 firebird
« Reply #4 on: April 22, 2007, 09:49:33 PM »


 

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