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Breaking wheel studs

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Old Aug 26, 2009 | 04:18 PM
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Default Breaking wheel studs

I have I-forged rims on my Z and have broke 3 different wheel studs since I have had the rims on my car. Any ideas to why this may be happening?
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Old Aug 26, 2009 | 04:19 PM
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how are you breaking them? ie tightening, driving, hard launches?
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Old Aug 26, 2009 | 04:32 PM
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Driving under normal conditions
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Old Aug 26, 2009 | 07:54 PM
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Are the wheels made specifically for the GM bolt pattern (5x120.6mm)?

What torque value do you use to tighten the lugs?
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Old Aug 26, 2009 | 08:32 PM
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Give Randy a call at Doug Rippie Motorsports (forum sponsor) and get some of their 90,000 psi studs. I used them when I put the big brakes on my vert.
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Old Aug 26, 2009 | 08:42 PM
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Over torqued ?

100 lb ft
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Old Aug 27, 2009 | 12:00 PM
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The only time I have seen broken studs is road racing or over torquing.
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Old Aug 30, 2009 | 03:08 PM
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Thanks for the responses, would being the incorrect offset cause studs to break off?
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Old Aug 30, 2009 | 07:01 PM
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I wouldn't think the offset would cause breaking studs but if the wheels aren't hubcentric I'd think you would have a problem.
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Old Aug 30, 2009 | 09:21 PM
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Originally Posted by AU N EGL
Over torqued ?

100 lb ft
MAX 100 lbs. some idoit did 130
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