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wheel offset?

Discussion in 'Wheels/Tires/Brakes' started by 14ksstang, Feb 16, 2015.

  1. 14ksstang

    14ksstang Member Established Member

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    wichita
    What wheel offset do these cars need for proper fitment. I've been debating on buying new wheels for a set of drag radials for the summer. Do these cars use the same offset as the 05-14 cars? I know the brakes are larger so wheel height has to be 17"s or larger from what I understand.
     
  2. roki187

    roki187 New Member Established Member

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    Illinois
    I'd like to find out as well....
     
  3. 2015DIBGT

    2015DIBGT Benjamin Martens Established Member

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    Location:
    Grafton Wi
    It really completely depends on the width of the wheels you want to go with.
    8.5”=+28 to +38mm
    9”= +35 to +38mm
    9.5”=+33 to +42mm
    10”=+40 to +48mm
    10.5”=+45 to +50mm
    11”=+55mm

    Ive done a little bit of searching for mine. I am getting 19x9.5s and 19x11’s and if you have the Performance Pack for the GT with the larger Brembos, like I do you need a +35mm in the front and +55mm in the rear to clear them. Information is from Forgestar and other brands on American Muscle’s site. I haven’t read anything regarding non performance pack brakes or aftermarket BBK’s.

    If someone is more knowledgeable than me on this subject, fell free to correct me.
     
  4. Budwise

    Budwise Track Addict Established Member

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    Austin, TX
    I have a GT PP with 19X10 +40's in front and back and they clear without an issue.

    In the end every wheel is different, clearances will be different depending on the barrel design and what brakes you have, there is no golden fitment.
     
  5. 2015DIBGT

    2015DIBGT Benjamin Martens Established Member

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    ^This is correct.
    There are millions of different setups and its impossible tell if it will exactly work unless you try it or have seen exactly what you want done already.

    Budwise, do you by chance have a picture of the clearance of the spokes and front Brembos?
    I believe you. I just want to see what the +40mm looks like.
    I am going +36mm on the fronts and if +40mm looks too close, i have to change my order asap.
     
  6. 14ksstang

    14ksstang Member Established Member

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    wichita
    I've just got a base gt not a pp. I'm looking to do a 10 while wheel in the back so I can run a wider tire for summer use. Not so much big and Littles just more rear tire.
     
  7. 15CompOrange

    15CompOrange New Member

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    Im curious if my Forgestar F14's would clear and be close to flush?

    19x10 DC +28 and 19x11 SDC +37
     
  8. ModBargains

    ModBargains New Member Established Member

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    La Habra, Ca
    No way that will work. The offset up front and on the rear is way too aggressive, and more importantly super deep concave fitment wheels will not work on the S550 platform in any fitment that will not look ridiculous. In order to clear the brakes the offset would be so aggressive the wheel would sit outside the fenders, so not a good look.

    A good fitment that I usually see for the S550's is 9.5 ET35 and 10.5 ET45, that's what we prefer so that we can use thick and meaty tires as well.
     
  9. beefcake

    beefcake Authorized Vendor Authorized Vendor

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    Cincinnati, OH
    if your looking for a drag setup, we have the racestars and the welds. 17x9.5 or 18x10.5 rear, and depending on front brakes. 17x4.5, 17x7, 18x5

    let me know if we can help out
     
  10. Todd03Blown

    Todd03Blown Well-Known Member Established Member

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    My wheel specs are as follows:

    WORK Wheels CR-2P

    20x10 +38 w/5mm spacer so their flat center caps will fit with 285/35/20 Hankook Ventus RS-3

    20x11 +45 with 305/35/20 Hankook Ventus RS-3.

    Front and rear are the super deep discs as this is a 2 piece wheel.
     
  11. nordy racer

    nordy racer Active Member Established Member

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    has anyone seen a 2015 with 19 x 9.5 rims all the way around with +33mm offset? would like to know if it looks dumb.
     
  12. 04SNK390HP

    04SNK390HP I hate SHEEPLE Established Member

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    Vilseck, Germany
    Can anyone confirm a wheel fitment for me?

    I'm looking at going with a TSW Nurburgring 19X9.5 ET41 square setup (275/40/19 Michelin Super Sport's). Based off a couple wheel offset calculator sites, it shows that the inner edge of the wheel will be 20mm closer to the strut and will the outer edge of the wheel will be 18mm closer to the fender.

    These measurements are based off using the stock 18" wheel offsets which are 18X8 ET40. Another consideration worth mentioning would be that the car will also be receiving BMR lowering springs.

    Does anyone see any possible fitment issues with the above wheel / tire size / offset / springs setup??

    Thanks in advance!!

    -Nick
     

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