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Prius 2010 only, tire pressure

Discussion in 'Gen 3 Prius Fuel Economy' started by bwilson4web, Dec 19, 2009.

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Prius 2010 only, tire pressure poll

Poll closed Dec 31, 2009.

  1. < 30 psi, 207 kpa

    0 vote(s)
    0.0%

  2. 30-32 psi, 207-221 kpa

    0 vote(s)
    0.0%

  3. 32-34 psi, 221-234 kpa

    2 vote(s)
    4.0%

  4. 34-36 psi, 234-248 kpa

    5 vote(s)
    10.0%

  5. 36-38 psi, 248-262 kpa

    6 vote(s)
    12.0%

  6. 38-40 psi, 262-276 kpa

    11 vote(s)
    22.0%

  7. 40-42 psi, 276-290 kpa

    18 vote(s)
    36.0%

  8. 42-44 psi, 290-303 kpa

    4 vote(s)
    8.0%

  9. 44-46 psi, 303-317 kpa

    2 vote(s)
    4.0%

  10. 46-48 psi, 317-331 kpa

    2 vote(s)
    4.0%

  11. > 48 psi, 331 kpa

    0 vote(s)
    0.0%
  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Please, this poll is for 2010 Prius owners. If there is something remarkable about your tires that would make the pressure range different (aka., snow tires, after-market) feel free to share but do include your target pressure.

    Note, the usual practice is to check the tire pressure every two months and in times of cooling temperatures, a little more frequently. Comments about 'what I found' versus 'what I expected' are always welcome.

    A short poll, it should be over December 31, 2009.

    Bob Wilson
     
    #1 bwilson4web, Dec 19, 2009
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  2. kgall

    kgall Active Member

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    Bob,
    Are all the tires for the Prius 44-45 psi max? If not, would there be a way to indicate in the poll a different maximum air pressure recommendation from manufacturer?
     
    #2 kgall, Dec 19, 2009
  3. Tideland Prius

    Tideland Prius Moderator of the North
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    40/38 for the stock tyres. My winters are actually running on 42/40 b/c of the higher max sidewall pressure.
     
    #3 Tideland Prius, Dec 19, 2009
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    This evening I found my tires at 40 psi. They are back up to 44-45 psi. The last time I checked them was about 2-3 months ago when I had the oil changed ... the standard Toyota tire pressures were found afterwards.

    Bob Wilson
     
    #4 bwilson4web, Dec 19, 2009
  5. Erikon

    Erikon Active Member

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    42-40 on my stock tires seems to give me good ride quality and I assume some MPG benefits.
     
    #5 Erikon, Dec 20, 2009
  6. bwilson4web

    bwilson4web BMW i3 and Model 3

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    I couldn't figure out a good way. For example, our 2003 Prius runs Sumitomo T4s that have a 51 psi maximum sidewall pressure. But other folks use different brands with lower sidewall pressures. The only way that makes sense is to ask folks to report their tire pressures actual and maximum ... ugly. The other is some sort of relative pressure to maximum sidewall, "max sidewall -4 psi" or "max sidewall +2 psi". Then we lose the absolute values.

    I may come up with an approach but right now, it looked to be too confusing.

    Bob Wilson
     
    #6 bwilson4web, Dec 20, 2009
  7. kgall

    kgall Active Member

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    Yeah, it's ugly to ask for actual and max sidewall pressures, but it gets the numbers you want.
    Am I right that all the original equipment tires are 44 psi max? Then you would only need to ask for max pressures for winter or other aftermarket tires.
     
    #7 kgall, Dec 20, 2009
  8. bwilson4web

    bwilson4web BMW i3 and Model 3

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    That is my understanding.

    Bob Wilson
     
    #8 bwilson4web, Dec 20, 2009
  9. tumbleweed

    tumbleweed Senior Member

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    According to our tire poll http://priuschat.com/forums/gen-iii...61926-what-tires-did-you-get-your-2010-a.html The PriusV (215/45-17) has come equipped with three different tires:

    Bridgestone Turanza EL400 max pressure 51 psi
    Michelin HX MXM4 max pressure 44 psi
    Toyo Proxis A20 max pressure 51 psi

    Information on pressures for Michelin and Bridgestone from the TireRack web site. For the Toyo's from the tires on my car.

    I use 48 lbs in my Toyo's; if I had the 44 psi tires I would use 42 lbs.
     
    #9 tumbleweed, Dec 21, 2009
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  10. ksstathead

    ksstathead Active Member

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    My Bridgestones are the Ecopia EP20 at 44 psi max (running at 40/38 for now).
     
    #10 ksstathead, Dec 21, 2009
  11. 2010priusowner

    2010priusowner New Member

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    42 to the front and 40 PSI to the rear is that the way wr do it here for best fuel economy?
     
    #11 2010priusowner, Aug 22, 2010
  12. fjpod

    fjpod Member

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    Is there any correlation between high tire pressure and the existence of the easily activated anti-lock brake issue?
     
    #12 fjpod, Aug 22, 2010
  13. Downrange

    Downrange Active Member

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    Just a comment - I've found my tire pressures tend to "naturally" go down by about a pound per week. I've taken to checking them at least once a month, and they are usually down 3-4 lbs/tire. When I let them get down that much, I can see the gas mileage hit clearly - about 2-3 MPG per tank.
    Make mental note to self - check tire pressures every couple of weeks!
    Tires seem to last longer at 40 PSI, as well, from what I've seen anecdotally.
     
    #13 Downrange, Aug 22, 2010
  14. ursle

    ursle Gas miser

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    Nitrogen...
     
    #14 ursle, Aug 22, 2010
  15. xs650

    xs650 Senior Member

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    I'm using a 78% nitrogen, 20% oxygen 2% misc mix.

    If the claims about air leaking out faster than nitrogen are true, I will soon have nearly pure nitrogen in my tires.
     
    #15 xs650, Aug 22, 2010
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  16. Downrange

    Downrange Active Member

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    Ha ha - nitrogen. Good one!

    Just keep 'em inflated.

    LOL, gotta love the snake oil salesmen!
     
    #16 Downrange, Aug 22, 2010
  17. Judgeless

    Judgeless Senior Member

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    Great stats for someone trying to figure out the best tire presure vs MPG's on a Gen III
     
    #17 Judgeless, Jan 9, 2011
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