328 16" wheels - convex/concave | FerrariChat
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328 16" wheels - convex/concave

Discussion in '308/328' started by cptdpt, Sep 10, 2008.

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  1. cptdpt

    cptdpt Rookie

    Aug 22, 2008
    48
    ZG CO US
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    Jaz Kokeny
    #1 cptdpt, Sep 10, 2008
    Does anyone have any information on when (or why) the 328 went from a deeper set rim ('86 and '87) to the more rounded wheels ('88) like on the Mondial 3.2? I thought maybe it had something to do with TRXs, but I don't know of many 328s running 390s. Was it simply dealer/owner preference or is there any difference in bolt patter/spacing etc. Coker shows identical sizes (16) for all model years.

    Jackson Kokeny
    Aspen CO USA
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,800
    30°30'40" N 97°35'41" W (Texas)
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    Steve Magnusson
    #2 Steve Magnusson, Sep 10, 2008
  3. cptdpt

    cptdpt Rookie

    Aug 22, 2008
    48
    ZG CO US
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    Jaz Kokeny
    #3 cptdpt, Sep 10, 2008
    Thanks. I searched the forum earlier for this very thread with muddled results. This helps. I suppose then that I cannot run concave (88.5+) wheels on a pre-suspension-change '88?

    Jackson Kokeny
    Aspen CO USA
     
  4. hardtop

    hardtop F1 World Champ

    Jan 31, 2002
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    Dave
    #4 hardtop, Sep 10, 2008

    Concave wheels were 86-88. Convex late 88-89. They do not interchange.

    Dave
     
  5. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,800
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #5 Steve Magnusson, Sep 10, 2008
    Last edited: Sep 10, 2008
    I think you misspoke there -- if you want to run the CONVEX (88.5+) wheels on a pre-suspension-change '88 chassis, that's doable, but requires some fairly thick (and expensive) bolt-on spacers.

    It's the other combination, the early concave 328 wheels on a 88.5+ 328 chassis that can't be done.
     
  6. snj5

    snj5 F1 World Champ

    Feb 22, 2003
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    Russ Turner
    #6 snj5, Sep 10, 2008
    Last edited by a moderator: Sep 7, 2017
    Although a bit fuzzy, this Mondial with ABS 'convex' larger offsets is fitted with the concave wheels with smaller offsets. You can see that this projects the wheel outside of the well an inch or so, and gives some handling and operational suspension changes. It would look the same if the concave wheels were fitted to a later ABS convex wheel 328.
    Hope this helps visualize.
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