Widest rim\tire that will fit my 66? - Pontiac GTO Forum
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post #1 of 37 (permalink) Old 08-04-2011, 09:59 PM Thread Starter
 
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Widest rim\tire that will fit my 66?

Hi all, I want to know the widest rim\tire that will fit my 66? I'm looking at these: Weld Racing 90-58346 Weld Racing Draglite 90-Series Wheel

Can I run 15x8 in front and 15x9 or 9.5 in the rear? And what spacer do I need? I'd like the fronts to look more proportion and not look like they sit too far in the fender. And I want to ditch the slicks so I want as much contact as possible. Now it has 15x8 in the rear.

Thanks!
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post #2 of 37 (permalink) Old 08-04-2011, 10:25 PM
 
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OK Batman, caught me on a good night, this question is asked so often on our cars that i jumped on my creeper and took a tape to it. Heres the two part answer.

1.) with stock style exhaust (they make a turn out right behind the rear tire)the max i would say would be 5" backspace on 15x8 rims and a 275 60R15 would not want that wide on front, i am running 235 60R15 on the front on 15x8 with 4" backspace and they barely tick the front edge of the fender when i cut it backing out (no problem on the road)

2.) if you were to get the rear section of the exhaust re-routed you could go up to 7" backspace with 15x10 (probably have to order that combo special made) and 295 60R15 but its a tight squeeze would probably want air bags in the springs to adjust the bounce and sway.

you have to remember that on higher profile tires 60 and 70 series the bulge out from the rim is around 1" on both sides making your 8" tire actually 10" wide at its apex and thats the part that will be close to your pipe and heating the air inside or worse yet melting your tire...not good!

Try these they make all the offsets you need, they made my wheels, little pricey but high quality billet wheels.

http://www.billetspecialties.com/ite...d=299&pid=1200

and here are teh specs on the draglite offsets and prices

http://weldracing.com/aitdownloadabl...itfile_id/176/

Last edited by Instg8ter; 08-04-2011 at 10:39 PM.
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post #3 of 37 (permalink) Old 08-04-2011, 11:43 PM Thread Starter
 
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Your car's tires look like they fit it well. Looks like I should try your setup. What size rear\backspace did you have? My pipes are dumped, you can kinda see from this old pic.


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post #4 of 37 (permalink) Old 08-04-2011, 11:57 PM
 
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i got mine off a trailer queen 57' chevy so i did not get to choose the backspace. if i were to order i would get 5" backspace front and back on 15x8" rims front and 15x9" back and go with 235 60R15 fronts and 265-75 60R15 back, that will get you about the widest rear that will fit and also gives it a little rake forward. i forgot, you said he had trimmed back the wheel well lips right and it also looks like your pipes cut out before where the bend would be....may be able to go a bit wider then. It's amazing when everything is new how smooth and comfortable these cars really ride, they really were the best of both worlds comfort and performance for their day.
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post #5 of 37 (permalink) Old 08-05-2011, 12:10 AM Thread Starter
 
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Thanks bro! Yea, I though she rode pretty good and mines not all new.

I'll call around and see if I can find a dealer that carries these things!

I found 2 dealers, have you ever heard anything about these guys?

McCormack Racing
Harlow Racing Tire & Wheels

Last edited by BatmanGTO; 08-05-2011 at 12:21 AM.
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post #6 of 37 (permalink) Old 08-05-2011, 07:10 AM
 
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Yep i used to play hockey for Harlow tire they are in Westland. you can also order direct from the two sites i sent you.....most likely they will need to order the backs at least so you may as well cut out the middle man.
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post #7 of 37 (permalink) Old 08-05-2011, 09:42 AM
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I have 295/50/15`s on the back with a 4 3/4 back spacing on 15x8 rims. They barely fit, had to trim just a tad off the inside inner fender and wheel well molding.
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post #8 of 37 (permalink) Old 08-05-2011, 11:25 AM Thread Starter
 
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Brian, were you on a travel league or was it a mens league? I used to play too.

As for the middle man, well I need to have them mounted and balanced anyway and that is usually included when buying new tires...unless these guys only sell and not install?

Rukee, would you happen to have and pics of the trimming needed? The PO appears to have already cut the trim, almost to where the screw holes are.

Thanks
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post #9 of 37 (permalink) Old 08-05-2011, 11:43 AM
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That should be pleanty.
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post #10 of 37 (permalink) Old 08-05-2011, 04:21 PM
 
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have any pics from the back Rukee.....wanna see how those meats look from behind, may just be the bend in my summit pipes thats close.

i still play at 46 Batman, was in a spring league when i was 15 that they sponsored, grew up right near where they are...the mount and balance too but any shop will do that if you take in your own.
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