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P3D+ misc info and pics- wheel weight, calipers, suspension

Discussion in 'Model 3' started by SD_Engnr, Aug 11, 2018.

  1. SD_Engnr

    SD_Engnr Member

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    Well, that was awkward... I went to install my 19" aftermarket wheels (Wedssport SA-67R w/Michelin PSS) that were collecting dust in the garage, and I ran into a bit of a problem with them not fitting. Model 3 wheel studs are 14mm, but my Infiniti are 12mm. It turns out that the mounting holes of the wheels were not meant for larger than 12mm. Doh! I should have looked into this ahead of time! I really wanted to run this set up as I love the look, and they're a minimum of 8 lbs lighter. Anyway, on to the info I gathered and some pictures I took.

    Wheel studs: M14x1.5
    20x8.5 w/tire weight: 52.5 lbs
    Rear rotor thickness: 20mm (.787")
    Front rotor thickness: 25mm (.985")
    Rear half shaft thickness: 25mm (.985")
    Front half shaft thickness: 25mm (.985")
    Hub ring: 64.1mm (2.523")
    These were gathered with a caliper that measured in imperial units.

    Did not get rotor diameter...

    Attached are photos because why not?
    20180811_172800.jpg
    20180811_172815.jpg
    AH, so that's how they made the front half shafts fit through the strut:
    20180811_172909.jpg
    20180811_172825.jpg
    Not a whole lot of room here:
    20180811_173914.jpg
    Random:
    20180811_173227.jpg
    20180811_164758.jpg

    20180811_164652.jpg
    20180811_164638.jpg

    20180811_164709.jpg
     
    • Informative x 12
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    • Love x 1
  2. Jedi2155

    Jedi2155 Please Insert a Model 3 into Avatar

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    So beautiful when their grime free....
     
  3. SD_Engnr

    SD_Engnr Member

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    Additional misc pictures:
    Oh you know, just some zip ties holding something to the upper control arm:
    20180811_172933[1].jpg
    20180811_172952[1].jpg

    Missing hardware:
    20180811_163950[1].jpg
    20180811_172103[1].jpg
    20180811_172845[1].jpg
    20180811_172834[1].jpg
     
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  4. Powered By Jay

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  5. jkirkwood001

    jkirkwood001 Member

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    Can you not have the stud holes on the wheels drilled to 14mm? I'm not a mechanic, have no idea if the consensus is that's unsafe.
     
  6. SD_Engnr

    SD_Engnr Member

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    I plan to explore this option, just need to find a reputable place to do it.
     
  7. Vines

    Vines Member

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    "Those aren't missing hardware, that's weight savings."
     
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  8. e-FTW

    e-FTW New electron smell

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    #8 e-FTW, Aug 12, 2018
    Last edited: Aug 12, 2018
    I see the suspension gets real close to the wheel, much like on the Model S. Any thoughts on possibility of using snow chains (because California)? On rear wheels only.
     
  9. juanmedina

    juanmedina Member

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    Noooo. I have wheels for my car as well and I bet I am going to have the same problem..
     
  10. SD_Engnr

    SD_Engnr Member

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    Go measure the lug holes and let us know. My goal this week is to find a machine shop that can safely open these up. Once I do that, I'll weight the cost of keeping these vs selling them and buying a new set.
     
  11. gtmotor

    gtmotor Member

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    I've been waiting for a thread like this! Can you do the community a huge favor and see if there is any difference with the overall suspension design vs the standard cars? BMW M series cars have significantly different setups. I'm going to be a little disappointed if only the springs are different.

    The weight zip tied to the control arm is probably some sort of harmonic damper. My Lotus likes to dynamically lighten itself (a nice way of saying parts like to fall off) so I've been slowly replacing fasteners through the years and loctiting them. Any car that sees regular track use could probably benefit from that...
     
  12. SD_Engnr

    SD_Engnr Member

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    I can take more photos, but as far as I can tell, there's little change in the suspension setup. Of course, to qualify that statement, I'd need a RWD 3 to inspect/measure against.

    As I said above, if there's a specific request, I'll take more pictures.
     
  13. FlatSix911

    FlatSix911 918 Hybrid

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    A good machine shop can drill the holes from 12mm to 14mm very easily. Are your Infiniti wheels hub centric @ 64.1mm?
     
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  14. SD_Engnr

    SD_Engnr Member

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    No. I think the Infiniti is 66.2, and I think the wheels themselves are 72.6 or so. If I keep the wheel, I'll source some hub centric adapter rings.
     
  15. FlatSix911

    FlatSix911 918 Hybrid

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    • Helpful x 1
  16. juanmedina

    juanmedina Member

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    I got lucky. I was able to fit a M10 socket which is 14.5mm OD through the lug holes.
     
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  17. Amp3d

    Amp3d Member

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    If you are able to get it, the rotor diameter, and the radius from the center of the hub to the outermost point on the brake calipers front and rear would be helpful. I’ve ordered the performance package with the 20” wheels as well but I’m interested to know whether certain 19” wheels will clear the brakes.

    Thanks for taking the time to post this information for everyone.
     
  18. Adam3

    Adam3 Member

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    Thanks for the detailed pictures and measurements, you da real MVP!

    Those brakes look fantastic.
     
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  19. TheLocNar

    TheLocNar Member

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    Zip ties?!?!
     
  20. Daniel in SD

    Daniel in SD Member

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    I believe the upper control arms are plastic. I guess they were too light and they had to attach weights :confused: Anyway the zip ties are just there to hold the weights until the glue dries.
     
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