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Has anyone run a 19" wheel as a spare on a car with 21" wheels?

Discussion in 'Model S: Driving Dynamics' started by JST, Dec 30, 2013.

  1. JST

    JST Active Member

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    Curious to find out whether anyone has driven their car with a single 19" wheel and three other 21" wheels. I'm trying to get a feel for how much tolerance the wheel speed sensors have for differences in wheel diameter. The 19" wheel/tire combo (245/45 19) is about .3 percent smaller in diameter than the 21" wheel and tire combo (245/35 21) (27.68 v. 27.75 diameter). What I'm interested in knowing is whether that difference in diameter causes the ABS, traction control and other systems to go into failure mode.
     
  2. William13

    William13 Member

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    I have not done this but see no concern as worn tires have this much discrepancy at times.
     
  3. Larry Chanin

    Larry Chanin Model S Perf Sig 1055

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    Can the 19" tire/wheel combos fit in the front trunk?

    Larry
     
  4. lloyds

    lloyds Member

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    Don't see why not, but it will take up a lot of space though
     
  5. Jeddi

    Jeddi Member

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    Hayward/Tahoma Ca
    Yeah there is just enough space for the the factory 19" wheel and tire in the frunk.
     

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