Tire suggestions - Pontiac GTO Forum
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post #1 of 2 (permalink) Old 02-15-2017, 06:36 AM Thread Starter
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Tire suggestions

Hello all. I'm fairly new to this forum and VERY new to cars. I've had my 68 GTO for a few months now and I'm doing a few things to it. I recently purchased a set of the Year One 17 Rally Wheels
(Front: 17x8 / Rear: 17x9). I have yet to purchase tires because I'm concerned about fitment. This is not a numbers matching car so I'm not concerned about the stock look. I don't know if any of the modifications that were made to the car would effect the size tire I can put on...so here I am asking you guys. The car has Global West suspension, 12 bolt rear with 3.55 gears. A few of my friends that know Pontiacs very well gave me the following recommendation for tires

Front: 255/40/17
Kumho*Ecsta 4X II

Rear: 275/40/17
Kumho*Ecsta 4X II

Any thoughts?
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post #2 of 2 (permalink) Old 02-23-2017, 12:27 PM
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I am trying to find the same info. Year one recommends 245/45/r17 tires on the 17 x 8 wheel. I am thinking about 235/45/r17 in the front for turning clearance. A 245/45 or a 235/45 is near the same circumference but not as wide and would give more turning room. The back is normally not an issue. I have not finished my car yet and have not been able to verify any of this.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO General Discussion

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