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tire pressure

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by yogadoc, Nov 7, 2012.

  1. yogadoc

    yogadoc Junior Member

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    i just picked up my prius plug-in yesterday. i overinflated the tires on my 2010 V the day i picked it up on the advice of priuschat members. i'm not sure if/how much it helped mpg, because i never drove the car with the tires at recommended pressures. so....who is or isn't overinflating their pip tires, and does it help??

    michael
     
  2. bisco

    bisco cookie crumbler

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    congrats! all the best. i have mine at 39 front, 37 rear. no idea if it helps. maybe a little. it couldn't hurt?(n)
     
  3. Chris11

    Chris11 Member

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    Run mine at 42/40. I'm sure you'll receive many suggestions. Just keep in mind the higher the pressure the less rolling resistance but the worse the ride. Hey, who cares about ride.
     
  4. gring40

    gring40 Junior Member

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    Contact patch is smaller too, so less traction with over-inflating, more skidding, etc.
     
  5. Chris11

    Chris11 Member

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    Huh? Oh I see, those damn Prius skids. Yep....watch out for the Prius skids....they're all over the roads.
     
  6. Adam Leibovitch

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    I have mine at 40, and meaning to offset front and back by 2 psi. The car rolls noticeably better when gliding. I am getting the same general distance on a charge, maybe half a a mile more, but there are different factors that affect it so its hard to tell. I did notice better mpg in HV mode because I could maintain higher coasting speeds.
     
  7. Tracksyde

    Tracksyde Member

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    I inflate mine to 42/40.

    My drive to work on 35/35 (something like that, whatever the dealer changed it to) was 13.0 miles. After inflating to 42/40, my trip meter says my drive to work is now 12.9. Of course, it's probably something like 13.01 vs 12.99, but still, there is a difference with the more inflated tire/increased rolling diameter. It does seem to roll/coast much better.
     
  8. mmmodem

    mmmodem Senior Taste Tester

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    Leaving stock until my warranty runs out. I don't want want complications from the dealer when I have a warranty claim. Besides, they'll just deflate them again every 5k miles during the free maintenance period. I plan to do 42/40 when I pass 36k miles.
     
  9. ryogajyc

    ryogajyc Active Member

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    Actually, I believe the opposite is true. The factory tire pressure is on the lower range so that the tire absorbs bumps for a more comfortable ride. In my Gen 2, I found that 35/33 caused the tire to noticeably wear on the edges, meaning a smaller contact patch. Bumping it up to 42/40 caused the wear to be even, meaning a larger contact patch.
     
  10. ny_rob

    ny_rob Senior Member

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    I'm running at 40/40, increased my overall mpg by a couple of ticks over the stock inflation mpg.
     
  11. PapaSB

    PapaSB Junior Member

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    In the UK we get 15 inch "alloys" with hubs. PSI seems to slip out of them like sand through your hands. Very odd.