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P85+ with 19" rims

Discussion in 'Model S: Driving Dynamics' started by jak, Jul 7, 2013.

  1. jak

    jak Member

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    Is this possible?

    I understand the P85+ uses wider 21" rims in the rear than in the front. But let's say you want to head to the snow where the 21s would not make sense. Can you swap the 21s out with 19s on the P85+?
     
  2. dsm363

    dsm363 Roadster + Sig Model S

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    Sure. You can buy the 19" winter wheel set from Tesla or there are aftermarket options as well. You can do this on the P85 so don't see any reason why this can't be done on the P85+.
     
  3. jak

    jak Member

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    That's great to know! Has anyone tried this? If so, how's the handling/ride and tire noise when switching to 19s on a P85+?
     
  4. Zextraterrestrial

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    I think It should be better than the 21's
    just staggered 19"s kills the 21"s. my 19"s are lower profile than the 21"s and quieter too

    but I can't speak for the P+.
     
  5. hiroshiy

    hiroshiy Active Member

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    Wow, I almost gave up hopes for P+, because 21" is the default on P+ and my garage (which is just a tray on a mechanical parking in a condo) only allows 19". I'm still waiting the car in Tokyo.
     
  6. dennis

    dennis P85D

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    #6 dennis, Jul 7, 2013
    Last edited: Jul 7, 2013
    The P+ is a package with both suspension and tire upgrades. It needs the additional traction of the wider/stickier rear tires to compensate for the reduced traction from the less-compliant bushings. I don't believe you can get 265/45/19's for the rear. The widest Michelin PS2 sold in 19" with 45 aspect ratio is 255. I'm not qualified to know if that is enough,
     
  7. mnx

    mnx 2013 P85

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    If you want to stick with Michelin's, the Pilot Super Sport is available in that size and many others sizes as well. (265/40, 275/40, etc.) It is Michelin's replacement for the PS2 and is rated as a better tire.
     
  8. hiroshiy

    hiroshiy Active Member

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    @dennis, thank you for your additional info. As anything wider than 245/45R19 will not fit my condo parking (which is actually one of the widest among mechanical parkings in Japan), I'll stick to stock RIMs and tires in 19. Is it going to be waste of money if I buy P+ and 19 set, essentially negating the positive effect of P+ suspension?
     
  9. dennis

    dennis P85D

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    IMO the P+ handles much better than the P85. But it requires the 21" rims as a pre-req for ordering the P+ package. So you would have to sell those wheels/tires, buy a set of stock 19s and buy PS2's in 245/45R19 size. You will definitely need the stickier tires with the P+ suspension. @lolachampcar knows a lot more about this than I do and could tell you the impact of running 20mm narrower rear tires.
     
  10. Al Sherman

    Al Sherman It's about THIS car.

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    Does this mean the 85+ wont be good (safe?) with 19'" snow tires?
     
  11. Oreo

    Oreo Member

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    How agressivly do you drive on snow anyway?
    Knowing I'd drive on my 19" snow tires I would drive accordingly.
     
  12. araxara

    araxara S-P85#3,218 X-90D#3,299

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    If your 19"s are lower profile than the 21"s, then your tire diameter is at least 2" smaller. This means that the car sits an inch lower and your revs/mi are off. This would mean your speedometer is off too. When your speedometer says you are going 55mph, you will be going about 51mph. See Speedometer Calibration for a conversion chart.
     
  13. Linux64

    Linux64 Member

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    #13 Linux64, Jul 11, 2013
    Last edited: Jul 11, 2013
    I hope that "size of tire" is a configuration setting that Tesla can change in the car's computer so that the displayed speed, etc is accurate.
     

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