help with 18 and 20 inch rims on 70 GTO - Pontiac GTO Forum
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post #1 of 18 (permalink) Old 03-16-2011, 03:23 PM Thread Starter
 
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help with 18 and 20 inch rims on 70 GTO

I want to run 18x8 on front and 20x8.5 or 10 on rear. Hotchkis suspension on it. i guess my questions are fitment and offset? anyone do this or can help?
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post #2 of 18 (permalink) Old 03-16-2011, 03:55 PM
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I don't know where you're going to find 20" x 10" x 120mm pattern with a 45-55mm or so offset unless you get some uber expensive custom ones made and you're willing to also do the fender rolling/cutting and some inside fender work too.

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post #3 of 18 (permalink) Old 03-17-2011, 05:35 PM Thread Starter
 
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This is on a 1970 GTO
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post #4 of 18 (permalink) Old 03-18-2011, 07:58 AM
 
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I saw a '70 with that type of "tall" wheels and skinny (sidewall) tires. It looked, well, FUNNY... I mean "entertaining" funny... Why would you do such a thing to THE classic muscle car? (many, including non-Pontiac people, believe '70 GTO to be the ESSENCE of "muscle car" as far as appearance goes) Wheel Vintiques offers 15" and 16" Rallye IIs that look like they "belong" there.

Not making fun, just curious, as I don't understand the rationale behind it. Maybe I'm just too old...

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post #5 of 18 (permalink) Old 03-18-2011, 08:29 AM
 
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17s are about as big as I like on these cars, but I have seen some really nice protouring cars with huge tires, but they were more like converted Pro Street cars with 15" wide rear tires 20s and slammed. And built by the pro shops for Sema.. Not Gangster cars with Candy adds on them.

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post #6 of 18 (permalink) Old 03-18-2011, 09:56 AM Thread Starter
 
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I have disc brakes all around which has the need for at least 17" wheels. I have a set of 18" temporary wheels on it now. I think slightly larger on the rear will still look respectable. im not looking to make this "gangstered out" clean smooth wheels. Just a little more to fill the wells. but i am still looking for an answer on offset +/-
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post #7 of 18 (permalink) Old 03-18-2011, 02:16 PM
 
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You might want to try the Team Chevelle forums. They do more of that kind of stuff than I've seen here on the GTO forum.
Personally I'm not a fan of massive hoops on any muscle car. I intentionally selected a Baer Brakes kit that would allow me to use 15" wheels.

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post #8 of 18 (permalink) Old 03-18-2011, 02:23 PM
 
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I had a friend at a shop a few years ago that would let me try different tire/wheel combos on my cars to check fitment. That way I could check the different combos and didn't have to rely on ancedotal info on the internet or get opinions that I didn't ask for......

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post #9 of 18 (permalink) Old 03-18-2011, 06:53 PM
 
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Here's a pic of a GTO with Vette rims on it, looks really good. But also has an IRS rear with coilovers. I think there c6 rims, so 18s and 19s.


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post #10 of 18 (permalink) Old 03-18-2011, 08:20 PM
 
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Here is a link to one. The front wheels are 19x8 and the rears are 20x10. The tires are 245-35ZR-19 in the front and 275-40ZR-20 in the rear. There is an url on one of the pic's and the name of the wheel designer.
LINK Click Here

66 GTO 4bbl power windows A/C auto
67 GTO H.O. Convert 4spd
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