1. john_dough

    john_dough New Member

    Joined:
    Aug 19, 2008
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    Location:
    Florida
    Your Vehicle Year:
    2008 Prius
    Recently the Discovery Channel had a show on that featured a Tricked Out Prius. A West Coast shop modified a Prius for a Toyota dealership in L.A.. One thing they did was to put 18 inch wheels on the thing. It looked neat, but can this be done without affecting calculation of mpg and modifying one of the ECU's?
     
  2. Tripod137

    Tripod137 New Member

    Joined:
    Oct 11, 2005
    145
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    Location:
    Long Island
    Your Vehicle Year:
    2006 Prius
  3. bedrock8x

    bedrock8x Senior Member

    Joined:
    Jul 8, 2008
    1,475
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    Location:
    California
    Your Vehicle Year:
    Other Hybrid
    YES,

    185/65/15 ===> 185/45/18
    speedo 60mph 60.2 mph
    Rev/mile 824 821
     
  4. drees

    drees Senior Member

    Joined:
    Oct 31, 2007
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    Location:
    San Diego, CA
    Your Vehicle Year:
    2008 Prius
    Good luck finding a tire in that size, or an 18" rim narrow enough to fit a 185 width tire.

    Best fit in an 18" tire that is seems to be available is 205/40/18. Difference from OEM in rolling diameter is minimal.
     
  5. bedrock8x

    bedrock8x Senior Member

    Joined:
    Jul 8, 2008
    1,475
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    Location:
    California
    Your Vehicle Year:
    Other Hybrid
    You are right, I didn't check availability.