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Who carries the highest tire pressure

Discussion in 'Gen 2 Prius Fuel Economy' started by morpheusx, Mar 3, 2008.

  1. morpheusx

    morpheusx Professor Chaos

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    I was curious if any of the serious "hypermilers" go higher then the tire sidewall of 44 PSI. I currently do 44 front 42 rear as recommended my so many. And also if anyone does go over 44 what pressure did you get to and decided to back it off a bit.
     
    #1 morpheusx, Mar 3, 2008
  2. diamondlarry

    diamondlarry EPA MPG #'s killer

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    At the risk of serious flaming, I will say that I pulled out of the dealer's lot, crossed the street to an air pump, and pumped the Integrity's to 60 psi and they have never been lower than that since. That was 5/19/07 and just shy of 15K miles ago. They have actually been at 70 psi for about the last 10K miles. I'm not planning on backing them off but, I have found that going past 70 doesn't seem to bring any more improvement. They have been as high as 80 psi for several days.
     
    #2 diamondlarry, Mar 3, 2008
  3. Bob64

    Bob64 Sapphire of the Blue Sky

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    Heres an interesting question: Would you pump up a tire that has been plugged (due to a nail) up to 60psi?
     
    #3 Bob64, Mar 3, 2008
  4. efusco

    efusco Moderator Emeritus
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    I use 50f/48r these days and can tell when it drops even 2 or 3 psi
     
    #4 efusco, Mar 3, 2008
  5. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
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    I would to 50psi (52 psi in the front). ;)
     
    #5 TonyPSchaefer, Mar 3, 2008
  6. Steamboatsig

    Steamboatsig Member

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    You should fill your tires with Helium. That way your car will float down the freeway.
     
    #6 Steamboatsig, Mar 3, 2008
  7. JimboK

    JimboK One owner, low mileage

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    <whispering> ... 60.

    Sshhh. Don't tell anyone.;)
     
    #7 JimboK, Mar 3, 2008
  8. tochatihu

    tochatihu Senior Member

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    If any of you "higher than sidewall" pressure folks would please go to the trouble of making some detailed tread wear measurements? There is a "myth" that over-inflated tires will show excessive center tread wear, and I think that in the case of radial tires, this needs to get busted.

    A $20 (Asian imput) digital caliper/depth gauge makes the job very fast and accurate, BRW.
     
    #8 tochatihu, Mar 3, 2008
  9. F8L

    F8L Protecting Habitat & AG Lands

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    60/58 here

    Tires wear is even so far but i only have about 2k miles at this pressure. Has been over 50psi since last fall though.

    On wide tires over inflation wear is very noticible. I believe the tires width plays a large role in whether or not a tire will show wear from under or over inflation. Narrow tires just don't have much surface area. *shrug*
     
    #9 F8L, Mar 4, 2008
  10. JimboK

    JimboK One owner, low mileage

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    I'll do that for you ... and me. I've got about 11K miles on mine now.

    A $5 manual gauge should suffice though, don't you think? I never had any reason to question its accuracy when I was in the tire business.
     
    #10 JimboK, Mar 4, 2008
  11. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
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    Though it is far from scientific, when I had to have my tire repaired, I took Priapus to Sears. They did a complete tire inspection of all four tires. All were over-inflated and had been for more than a year. According to their checks, there was no ill wear to the tires. They check multiple spots per tire: middle, inside edge, outside edge.
     
    #11 TonyPSchaefer, Mar 4, 2008
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