18" GXP wheel specifics - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Bonneville GXP/ Northstar Powered Cars Discuss your Bonneville GXP and/or any other Northstar powered Olds or Cadillac... Including the 3.5L Twin Cam V6 (Short Star ) 4.0L and 4.6L Northstar V8's. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-02-2010, 02:06 PM   #11
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Quote:
Originally Posted by sawgunner View Post
people have done it but not really recomended
I've done it, and in 20k miles, I broke two studs. Not recommended.
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Old 05-02-2010, 10:24 PM   #12
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They will slip on but not center up. So when you torque the nuts down, you are putting side force against the lugs. Done it, snapped lugs.
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Old 05-03-2010, 01:16 AM   #13
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the "DEALERSHIP" installed the rims that are on my car right now, and they are 114.3
havent had a problem, yet
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Old 05-03-2010, 01:22 AM   #14
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.7 may be enough slack I guess. But I have put some Pontiac rims on a Chevy (not sure of the size discrepancy)(some time ago. They seemed to fit just a little tight. Torqued then down and soon ping, ping. Started snapping lugs. I guess it'* a gamble you have to evaluate yourself. At the speeds I get to once in awhile, I like the safe side of things.
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Old 05-03-2010, 02:04 AM   #15
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Quote:
Originally Posted by GXP Venom View Post
They will slip on but not center up. So when you torque the nuts down, you are putting side force against the lugs. Done it, snapped lugs.
humm yea i can see that happening over time.. Thanks for the heads up!!!
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Old 05-03-2010, 12:34 PM   #16
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Quote:
Originally Posted by SAMzGXP View Post
the "DEALERSHIP" installed the rims that are on my car right now, and they are 114.3
havent had a problem, yet
Give it a little while. Its a gamble I wouldn't make again, ever. Simply put, its the wrong bolt pattern. Sure its only .35mm off per bolt, but that'* enough to put unnnecessary stress on your studs. You might not drive like I do, but I push my cars very hard, and its in circumstances like those that I don't want to take that chance. If you do drive as hard as I do, then you're taking a huge risk. Its like supercharging an stock L27. Just because it won't break in the first 10-20k miles, doesn't mean it won't break eventually.

I had the Audi A4 rims on my 95 Regal bored out professionally by a shop in California for $25 a wheel and had the 5x112 bolt pattern drilled out and the 5x115 pattern pressed in.
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Old 05-04-2010, 11:36 PM   #17
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Yeah I see where you're coming from, I'm just shocked it was installed by the dealership themselves
I'm thinking 20s sometime soon so maybe I'll get the right bolt pattern
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Old 05-09-2010, 06:09 PM   #18
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Anyone know the weight of the GXP wheel?
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Old 05-09-2010, 06:13 PM   #19
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i think they are between 22 and 24LBS each
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Old 05-09-2010, 09:30 PM   #20
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Hefty for an allloy wheel. LOL Am email to Ed Morad might get you an answer, Their pretty cool about just answering questions and I know they have shipped their share of them.
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