need advice about rims and tires for 68 gto - Pontiac GTO Forum
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post #1 of 8 (permalink) Old 03-21-2006, 09:41 PM Thread Starter
 
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need advice about rims and tires for 68 gto

i just bought a 68 gto. i need to replace the rims and tires. Does anybody know how wide of a 15 inch rim and tire i can go and with out any rubbing on a launch. also what backspacing. thank you i am a first time gto owner
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post #2 of 8 (permalink) Old 03-21-2006, 10:27 PM
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Welcome to GTOforum;

15 x 7 with 4-1/2” backspacing.

Polyglas tire, F60 x 15

radial tire P205/75R15

Randy


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post #3 of 8 (permalink) Old 03-21-2006, 10:51 PM Thread Starter
 
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thanks
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post #4 of 8 (permalink) Old 03-22-2006, 01:16 PM
 
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I'm running 245's on my '70 with plenty of clearance. The 15" wheels are so old I don't know what the backspacing is.
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post #5 of 8 (permalink) Old 03-27-2006, 07:29 PM
 
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I have a 68 and am about to put on a set of 17x9" rims with 275s in the rear. They do not appear to rub, but you will also have to take into account the exhaust pipes the come down just under the rear inner fender well. Too big of pipe or bend will limit your size of the rear tire.
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post #6 of 8 (permalink) Old 03-28-2006, 07:26 PM
 
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My '66 has 245's on the back, on 14x7 or 8's....not exactly sure. Plenty of room
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post #7 of 8 (permalink) Old 06-16-2006, 11:31 PM
 
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On the back of my 68 I am running 295 R50 x 15s and 235 R 60 X15s on the front. I have a 474 CI and 200 HP of juice and even with two people in the back seat these do not rub or hit. The wheels are Rally IIs 8 1/2 in the rear and 7s in the front..

Rock
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post #8 of 8 (permalink) Old 06-18-2006, 09:55 PM Thread Starter
 
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Rock,
thanks for the replay. I put 255/60/15 on rear 8" and 215/65/15 on front 7".
I bought rally II's from wheel vintiques.
matt
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