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New rubber & 15" Rallys for '69 GTO

  
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New rubber & 15" Rallys for '69 GTO

 
69GTOby 69GTOby
Guru | Posts: 1117 | Joined: 02/09
Posted: 07/04/10
11:58 AM

Right now my '69 GTO has very old, dry-rotted 245/60/14 Dunlop tires on 14X6 Rallys.  Due for an upgrade!   The way I see it, I only have a couple tire choices with 14" wheels, thus I have decided to upgrade to 15" Rallys (already found a good used set).  As for the rubber: I want to go to 275/60/15 in the rear and 245/60/15 in the front.  Will I run into any fitment/clearance issues with the rear tires?

I am considering BF Goodrich Radial *** Cooper Cobra GT, or Mickey Thompson Sportsman S/T for tires.  I am leaning towards the M/Ts for the few dollars more per tire, but I would like to hear any comments or suggestions.

Can't wait for the fresh rubber and clean wheels!  
****
1969 GTO resto in progress. '76 350+.060, #13 heads, 9.2:1 CR, Lunati cam, Edelbrock Performer, 750 Holley, HEI, Ram Air manifolds, 2 1/2" exhaust. TH400 trans w/shift kit and 2400 stall.  235/60/15 front, 275/60/15 rear on Rally II 15X7s.  GM 12 bolt posi with 3.73's.

idrivejunk idrivejunk
Addict | Posts: 5151 | Joined: 12/09
Posted: 07/04/10
05:11 PM

275 60s in back should work but may rub depending on the individual car and type of tire. I run them out back on my 69 GP and they can rub on big dips. Same tire on my '72 Cutlass does not rub. Just be sure to round off wherever the tire might rub, so it doesn't get cut.

On the front- Here again- 255/60s rub on turns, at the back of the fender. No rub if on the Cutlass. Its an A body like the Goat, but really so is the GP. Anyway, using Pontiac rallys you should have a very nice fit. Possibility of a small rub.

255s or 245s make great all-around tire sizes, but next step down might be 255 and 235 on big-n-littles, to keep the same kind of rake if the size you want is too big. Last of all, I have a set of Uniroyal Tiger Paw GTS that seems to be a great tire, with raised solid white letters. Love em but my fave is the Goodyear Eagle GTII, best looking and longest lasting. You will buy two sets of radial T A 's for one set of GTIIs. JMHO.  
idrivejunk

Justin-Az Justin-Az
Enthusiast | Posts: 257 | Joined: 03/10
Posted: 07/04/10
05:25 PM

Check out Coy wheels as they have some good looking wheels like the ones they made for the car in fast and furious movie. I bought my 18" Cragar SS from them and they are/where good people to deal with.

http://www.coyswheel.com/coys.html  

69GTOby 69GTOby
Guru | Posts: 1117 | Joined: 02/09
Posted: 07/04/10
05:26 PM

Awesome.  Thank you for the reassurance.  I also found this car while doing a search for GTOs with these tires http://www.antiquecar.com/index/listings/page11772.htm.  He's running the sizes we're talking about with BF Goodrich lettering.

I'll do 245/60/15 up front and 275/60/15 out back.  I have a pair of adjustable air shocks in the back, so if they rub, I'll pump up it up.  The Rallys I'll be running are 15x7, the 275mm wide tires are recommended to wrap around a minimum 7.5" wide wheel.  But, I'm not going to worry about it too much.

I'll look into the Goodyear Eagles you mention.  Throughout my tire searching I didn't come across them in the sizes I'm after, but I'll look closer.  
****
1969 GTO resto in progress. '76 350+.060, #13 heads, 9.2:1 CR, Lunati cam, Edelbrock Performer, 750 Holley, HEI, Ram Air manifolds, 2 1/2" exhaust. TH400 trans w/shift kit and 2400 stall.  235/60/15 front, 275/60/15 rear on Rally II 15X7s.  GM 12 bolt posi with 3.73's.

idrivejunk idrivejunk
Addict | Posts: 5151 | Joined: 12/09
Posted: 07/04/10
05:32 PM

I think Summit still has them but they might be discontinued. Your 245s up front is a good choice. The 275s will be fine on the 7"ers and look wide. The skinnier rim helps avoid the rub, but you'll have to run lower tire pressure to wear the tread evenly.  
idrivejunk

Justin-Az Justin-Az
Enthusiast | Posts: 257 | Joined: 03/10
Posted: 07/04/10
05:46 PM

Just decrease the profile of tire as your wheel diameter increases. The GTO could run 18" wheels without problems. I have 18" Cragars on my Catalina (for now) but could easly go to 20" wheels if desired just by going with lower profile tires. If do that the overall diameter of tire and wheel can stay the same even though you add inches to the wheel size.  

Justin-Az Justin-Az
Enthusiast | Posts: 257 | Joined: 03/10
Posted: 07/04/10
05:51 PM

Here is a 1969 GTO running 18" front and 20" rear wheels, its static dropped on springs and not bagged.

Gto  

69GTOby 69GTOby
Guru | Posts: 1117 | Joined: 02/09
Posted: 07/05/10
08:36 AM

Yes, these Goats really do have very sizable wheel wells.  Lots of room to stuff wheels and tires into.  Not sure how I feel about those wheels on that car in the pic above.  Just not really my style, but a prime example of the fitment potential.  I like Rallys, steelies, Cragars, the drag style wheels, like Pro Star and Centerline, and those "Muscle Car" wheels.  Those look like they belong on an Escalade to me, just my opinion. I do like the look of some neg camber in the front.  And I like the shaker hood, that's awesome.

Now I just need to find the time to go get these wheels, they're about 2 hours away from me.  I'll try to post some pics of before and after once it's all said and done.  Thanks for all the help guys.

I'm still leaning towards the Mickey Thompson Sportsman S/Ts.  They have a good looking tread and the name has a great rep.  
****
1969 GTO resto in progress. '76 350+.060, #13 heads, 9.2:1 CR, Lunati cam, Edelbrock Performer, 750 Holley, HEI, Ram Air manifolds, 2 1/2" exhaust. TH400 trans w/shift kit and 2400 stall.  235/60/15 front, 275/60/15 rear on Rally II 15X7s.  GM 12 bolt posi with 3.73's.

Torqued400 Torqued400
Addict | Posts: 2479 | Joined: 10/08
Posted: 07/05/10
10:52 AM

I think those M/T sticky tires wear out quickly because their soft, I'm with id and like the goodyears.  
"We build Excitement"

Justin-Az Justin-Az
Enthusiast | Posts: 257 | Joined: 03/10
Posted: 07/05/10
11:01 AM

JB,

I don't like the style of those wheels on the yellow GTO either as they look like overgrown Camaro wheels. If you truly like Cragars and like the look of larger sized wheels send me a PM as I will sell you mine for a very good price (less than 1/2 of new cost. They are 18" Chrome Cragar SS wheels and mounted on Pirelli tires, they are only a few months old and have less than 200 miles on them. See photo below.  Cool (ignore the oil on the ground its been fixed)  Smile

005  

Torqued400 Torqued400
Addict | Posts: 2479 | Joined: 10/08
Posted: 07/05/10
03:11 PM

Check out my wheels

My69gtojudge003  
"We build Excitement"

idrivejunk idrivejunk
Addict | Posts: 5151 | Joined: 12/09
Posted: 07/05/10
05:46 PM

steam-rollah baby!  
idrivejunk

gtojack1366 gtojack1366
Guru | Posts: 1265 | Joined: 11/09
Posted: 07/05/10
06:11 PM

Bobspictures008I have 275/60/14 on rally 2 wheels on the back of my 69 GTO and they rub on the inter wheel well and I have air shocks it doesn't help at all .Bobspictures007  

Torqued400 Torqued400
Addict | Posts: 2479 | Joined: 10/08
Posted: 07/05/10
06:18 PM

Tubbin time Grin  Hey Jack, nice grass,...clean garage too...Oh and not a bad GTO either Grin  
"We build Excitement"

Justin-Az Justin-Az
Enthusiast | Posts: 257 | Joined: 03/10
Posted: 07/06/10
11:03 AM

If tires rub a little is it possible to fix it by rolling the fenders. I ask as saw the import guys roll fenders to put larger tires so wonder if it can work on our American cars as well. They do it using tool below but have also seen a guy do it using a baseball bat.

Fenderlip  

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