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Model "S" Wheels/Tires

Discussion in 'Model S' started by tdelta1000, Jul 19, 2009.

  1. tdelta1000

    tdelta1000 Active Member

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    Me again and this time I questions about the wheels & tire. I've seen several posts about the Mod "S" specs but not too many on the wheels/tires.

    Does anyone know will there be a pressure gauge integrated in the core system of the "S"? or will the car have run flat tires?

    If not run flat tires, were will the spare tire reside?
     
  2. efusco

    efusco Moderator - Model S & X forums

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    I'm quite confident that none of those decisions have been finalized.

    Run flats would be nice, but considering that the car is more of a commuter vehicle than a highway vehicle I'd prefer to save the cost of the run flats and either just carry a doughnut spare (maybe under the hood) or even a little emergency flat kit...though that would preclude the tire pressure monitoring which I think is an almost guaranteed thing.
     
  3. vfx

    vfx Well-Known Member

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    The current S prototype has run flat tires on it.
     
  4. tdelta1000

    tdelta1000 Active Member

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    #4 tdelta1000, Jul 20, 2009
    Last edited: Jul 20, 2009
    It makes sense that they will use run flats but has Tesla made a concrete statement about the use of run flat tires? Also, who will be manufacturing those tires?
     
  5. vfx

    vfx Well-Known Member

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    #5 vfx, Jul 20, 2009
    Last edited: Jul 21, 2009
    I'd guess you are at least a year early with questions like that.
     
  6. tdelta1000

    tdelta1000 Active Member

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    #6 tdelta1000, Jul 20, 2009
    Last edited: Jul 21, 2009
    VFX,

    Here's a link on the subject of run flat tires.

    Run flat tire information according to Wikipedia and its sources.

    Here's what I found on the net:

    Bridgestone RFT (Run Flat Tire)
    Dunlop DSST (Dunlop Self-Supporting Technology)
    Firestone RFT (Run Flat Tire)
    Goodyear EMT (Extended Mobility Technology)
    Kumho XRP
    Michelin ZP (Zero Pressure)
    Pirelli RFT (Run Flat Technology)
    Yokohama Run Flat
     
  7. tdelta1000

    tdelta1000 Active Member

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  8. 2blue4u

    2blue4u I'm blooooo

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    In a few years, we'll all have to use run-flats. But don't wish for them for they do make for a harsher ride.
     
  9. ChrisC

    ChrisC see signature

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    #9 ChrisC, Jul 22, 2009
    Last edited: Jul 22, 2009
    It's now a safety mandate. From Tire-pressure monitoring system in Wikipedia :

    Now, there are ways to satisfy this requirement without direct pressure readings, instead reading secondary effects, so the question of actual pressure measurement remains ...

    As I recall it (and please correct me if wrong), Tesla was able to get waivers for the Roadster on some federal requirements by virtue of low volume, but for the Model S they should need to meet everything.
     
  10. tdelta1000

    tdelta1000 Active Member

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    Any idea on the weight of the wheels for the Model S? I ask this because weight can be an enemy of an EV vehicle.
     
  11. tdelta1000

    tdelta1000 Active Member

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    Someone mentioned that the tires that the running preproduction of the Model S is rolling on Advan Sport tires. After some research here's what I found.

    255/30ZR21
    Load Index 93 = 1433lbs (650kg) per tire
    Speed Rating “Y” = 186mph (300kph) 93Y RF Treadwear: 180
    Traction: AA
    Temperature: A180 AA A 1433 lbs.
    50 psi
    10/32"
    28 lbs. 8.5-9.5"
    9"
    10.2"
    9.2"
    27.2"
    765
    Country of Origin "JP" = JAPANJP

    255/35ZR21
    Load Index 98 = 1653lbs (750kg) per tire
    Speed Rating “(Y)” = 186+mph (300kph) (98Y) RF Treadwear: 180
    Traction: AA
    Temperature: A180 AA A 1653 lbs.
    50 psi
    10/32"
    29 lbs. 8.5-10"
    9"
    10.2"
    9.2"
    28.2"
    737
    Country of Origin "JP" = JAPANJP

    295/25ZR21
    Load Index 96 = 1565lbs (710kg) per tire
    Speed Rating “Y” = 186mph (300kph) 96Y RF Treadwear: 180
    Traction: AA
    Temperature: A180 AA A 1565 lbs.
    50 psi
    10/32"
    30 lbs. 10-11"
    10"
    11.6"
    10.9"
    26.9"
    772
    Country of Origin "JP" = JAPANJP

    295/35R21
    Load Index 107 = 2149lbs (975kg) per tire
    Speed Rating “Y” = 186mph (300kph) 107Y XL N0 (Porsche) Treadwear: 280
    Traction: AA
    Temperature: A280 AA A 2149 lbs.
    50 psi
    11/32"
    33 lbs. 10-11.5"
    10.5"
    11.7"
    10.6"
    29"
    717
    Country of Origin "JP" = JAPANJP

    Preproduction Tesla Model S tire information
     
  12. vfx

    vfx Well-Known Member

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  13. Cobos

    Cobos S60 owner since 2013

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    Probably because they don't look as good on a prototype that isn't going to go more than maybe 20 miles. I suppose wheel options is something that they will expand on as needed when they approach lockin date. After all they don't need to redo much engineering to give another tire option.

    Cobos
     
  14. tdelta1000

    tdelta1000 Active Member

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    I think I may have found the answer to my own question. While surfing on the Roadster side of the house I found this image:
    IMG_1617_1.jpg

    The screen shot is from the VDS in the Roadster. It gives me a clue as to tire pressure monitoing system that may be installed in the Model S. I think the Model S will have TPS system but the interface will look a lot nicer.
     
  15. DGreifinger

    DGreifinger New Member

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    Run flat tires are aweful! They have a terrible ride and are very expensive as well as non-repairable. I hope Tesla does not use them, or at least offers the option of traditional tires.
     
  16. Mark Petersen

    Mark Petersen Model S EU P71

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    Witch type of run flat are you referring to, as there is several different types
    as not all are created equal
     

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