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  1. #1
    Nobody Special
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    Wheel stud alloy and hardness?

    Any of you racer types happen to know the specific alloy and hardness of modern BMW wheel studs?

    Thanks


  2. #2
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    Member No: 137859 bigblock is an unknown quantity at this point bigblock's Avatar
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    Re: Wheel stud alloy and hardness?

    I would think they're the same as a grade 8 bolt, at least grade 5. Carbon/moly blend most likely 250 280 bhn.Welding requires special treatment,Heating with a torch will make it brittle as glass.[IMG][IMG]img=137859[/IMG][IMG]

  3. #3
    DanC-1996M3
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    No idea, but I'd bet Turner Motorsport's = ideal


    I hear of so many people converting to the TMS wheel studs (from the stock wheel bolts) and I'm sure if there was any kind of hardness or quality issue, it would have been out on the racer forums a while ago. I've been wanting to get a set to use on my street car, just so I don't have to deal with aligning those first couple bolts.


    dc


  4. #4
    friend of mine. Nobody Special
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    Thanks guys. Question came to me from a raceshop


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