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wheel and hub question

Discussion in 'Technical Q&A' started by kosmo, Feb 27, 2011.

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  1. kosmo

    kosmo Formula 3

    Oct 19, 2008
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    #1 kosmo, Feb 27, 2011
    Last edited by a moderator: Sep 7, 2017
    I just got a new set of after mkt wheels mounted on a VW Passat. The NTB tech tells me that the wheel center is larger in diameter than the center of the hub by about a 1/2 inch, thus the 5 bolts are the only thing hold the weight of the car. The old wheels, also after mkt, rested on the center hub perfectly. This doesnt seem right or safe to me and i cant recall how it is in other cars. Any thoughts? Here are some pics:
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  2. 2NA

    2NA F1 World Champ
    Consultant Owner Professional Ferrari Technician

    Dec 29, 2006
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    Tim Keseluk
    #2 2NA, Feb 27, 2011
    If you are concerned about it a spacer ring that fills the space between the hub and the wheel is what you need.
     
  3. kosmo

    kosmo Formula 3

    Oct 19, 2008
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    #3 kosmo, Feb 27, 2011
    thanks Tim, but is this normal? Studs are always busting so thats what concerns me.
     
  4. 2NA

    2NA F1 World Champ
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    #4 2NA, Feb 27, 2011
    I'd be surprised to see them break but depending on the holes/bolts they might not run absolutely true.
     
  5. Ehamilton

    Ehamilton F1 Rookie
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    #5 Ehamilton, Feb 27, 2011
    And that's plenty, as long as the bolts are torqued tight enough that they aren't subject to the cyclic loading and unloading that leads to fatigue failure. In fact, the bolts shouldn't be carrying a lot of shear load at all - most of the weight of the car is being carried by the clamping force between hub and rim, and the bolts in tension are applying that clamping force.

    The problem with these "lug-centric" (as opposed to "hub-centric", which fit tightly around the center of the hub) wheels is that it is much harder to get them exactly centered on the hub, so they are prone to annoying vibrations and wheel shimmy at speed. You may be able to get them on and keep them centered (using a torque wrench makes it a lot easier - even tightening is everything here) well enough, or you can have a set of centering rings made up for you. Any decent machinist can make these rings on a lathe, or you could try Serpent AutoSport at http://www.serpentautosport.com/.
     
  6. Meister

    Meister F1 Veteran
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    #6 Meister, Feb 27, 2011
    Get some hub centric rings.

    I had to do this when fitting wheels to the 308. Measure the ID of the wheel hub/mounting flange, the OD of the rotor hub then search for the correct ring. I think they only come in Metric...

    Google "hub centric rings" and it will bring you to several places that sell them online.

    If I'm reading your post right, its funny the tech doesn't know about rings. Metal are better than plastic of course, but aren't always available.

    Good luck
     
  7. Glen_Lloyd

    Glen_Lloyd Formula Junior
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    #7 Glen_Lloyd, Feb 27, 2011
    What he said... I use them on my BMW
     

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