Question: Lug bolt pattern for US 2004 STi vs 2005 Sti.

Discussion in 'General Motoring' started by Philip Procter, Sep 4, 2004.

  1. I just bought a 2005 STi (USA) and then bought a set of snow tires and
    rims from a guy who had sold his 2004 STi. I assumed the lug bolt
    pattern for the 2004 and 2005 STi's would be the same.

    Nope!

    The rims will not fit, the diameter of the bolts is much smaller than
    my 2005. I'm now have a set of rims that don't fit that I'd like to
    sell on ebay. Before I do, I'd like to be certain that these were from
    a normal US spec 2004 STi.

    Could one of you fine, upstanding citizens of the USA measure the
    diameter of the bolt pattern on your 2004 STi so I don't make an
    expensive boo-boo when I list them on ebay.

    Thanks loads for your help!

    Philip
     
    Philip Procter, Sep 4, 2004
    #1
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  2. Philip Procter

    FNO Guest

    Are you sure they were off of an 04 STi? The 05 is supposed to be the same
     
    FNO, Sep 4, 2004
    #2
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  3. They're different. '04s are 5x100, '05s are 5x114.3.

    Don't let anyone tell you different :)
     
    Patrick Fisher, Sep 4, 2004
    #3
  4. Philip Procter

    Xtranet Guest

    05's have larger bolt patterns than 04's.
     
    Xtranet, Sep 4, 2004
    #4
  5. Philip Procter

    Gadgets Guest

    Gadgets, Sep 5, 2004
    #5
  6. Yes. PCD is bolt circle diameter (I forget what the P really stands for), or
    the second number in 5x100. The '05s have a bigger PCD - 114.3. Both have
    five lugs, hence 5xPCD
     
    Patrick Fisher, Sep 5, 2004
    #6
  7. Philip Procter

    Hallraker Guest

    Any idea why they changed this?

    -Matt
     
    Hallraker, Sep 5, 2004
    #7
  8. They switched to wider wheels as well - 17x8, rather than 17x7.5. I suspect
    they felt the larger bolt circle would provide a bit of added robustness to
    the hubs and wheels.

    The net impact is that us '04 STis are left with relatively few choices of
    wheels in which the offset and spoke design will clear the brembos, and it's
    now a dead-end line to bother making more. Meanwhile, the '05 guys get
    screwed with very poor aftermarket coverage of their bolt pattern in
    subaru-specific offsets for the time being.

    Oh well. I'm happy with my sets of wheels :)
     
    Patrick Fisher, Sep 6, 2004
    #8
  9. Philip Procter

    Gadgets Guest

    From the press release:
    "A unique wheel mounting and bearing design produces optimum strength and
    stability between axle and wheel, raising the cornering threshold."
    Doesn't seem like something they'd change for little reason, so long term we
    may see all models go this way...

    Cheers, Jason (remove ... to reply)
    Video & Gaming: http://gadgetaus.com
     
    Gadgets, Sep 6, 2004
    #9
  10. Philip Procter

    Hallraker Guest

    I think the wheel mounting has always been "unique". I know from my recent
    two flat tires ordeal that spares from several other makes and models will
    not fit.

    -Matt
     
    Hallraker, Sep 6, 2004
    #10
  11. Given the expense for BBS to retool for a new wheel and for Subaru to
    carry a spares inventory of two sets of wheels, rotors etc. , I, too,
    can't believe Subaru made this change without reason. I'd just love to
    know the reason!

    It could be a subtle improvement in 'cornering threshold' but the evil
    in me suspects warrantee returns due to some design weakness.

    Speculation is fun, that's my moto!

    Philip
     
    Philip Procter, Sep 7, 2004
    #11
  12. Philip Procter

    hippo Guest

    hippo, Sep 7, 2004
    #12
  13. Philip Procter

    CompUser Guest

    Who knows...

    Are the WRX wheel sizes still the same? Maybe
    next year, the WRX will bump up to a 17x7 wheel.

    I finally put some 17x7s on my 04, and
    yowsers...no, I don't need to be thinking about
    suspension *anything*, not for a while. The
    immediate need became "how do I secure all this
    crap in the trunk", which suddenly became
    extremely mobile, on every drive.

    World of difference to those tire/wheel sizes.
     
    CompUser, Sep 7, 2004
    #13
  14. Philip Procter

    Ken Gilbert Guest

    Any idea why they changed this?

    bigger wheel hub bearings.

    a common point of failure on subies pushed hard in the corners.
     
    Ken Gilbert, Sep 7, 2004
    #14
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