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21s and range

Discussion in 'Model S: Battery & Charging' started by steilkurve, Jun 20, 2015.

  1. steilkurve

    steilkurve Member

    Joined:
    Mar 28, 2015
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    288
    Location:
    Montreal, Canada
    Curious, does changing tires from 19 to 21s affect how the car calculates rated range? Asking because I recently installed turbine 21s on my new P85D, about a month into ownership. At that point, I also started charging at 70% instead of 90. Ever since, I have seen a rated range reduction. So, would that be the 3% range loss from the 21s, the 70% debalancing the cells or just plain degradation? Latter would surprise me as 1600 miles on the car but... Any info appreciated. Thanks.
     
  2. jerjozwik

    jerjozwik Active Member

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    May 12, 2014
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    1,056
    Location:
    san gabriel valley
    did you add new tires with your new wheels? car is still kinda new to get a real ideal of range, i think the first p85ds had to get into 5,000 miles before range became consistent.
     
  3. tomanik

    tomanik Member

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    Location:
    Canada
    My thought would be "70% debalancing the cells."
     
  4. steilkurve

    steilkurve Member

    Joined:
    Mar 28, 2015
    Messages:
    288
    Location:
    Montreal, Canada
    Yep. Went from 19s with Tesla's standard tires to the 21s with ContiSports so sticky rubber summer tires.
     

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