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Nw LRR tires but they set to 35 psi?

Discussion in 'Gen 3 Prius Main Forum' started by Jim Caldwell, Sep 14, 2019.

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  1. William Redoubt

    William Redoubt Senior Member

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    I run my tires at 40. Difference between 35 and 40 psi is 6 miles per gallon. I have tested it many times.
     
    #61 William Redoubt, Sep 25, 2019
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  2. William Redoubt

    William Redoubt Senior Member

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    I have been shorting Tesla and Diminishing Returns for years and making a boat load.
     
    #62 William Redoubt, Sep 25, 2019
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  3. William Redoubt

    William Redoubt Senior Member

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    I am so sick of this type of comment. Anecdotes are VERY MEANINGFUL. In fact, every court in the world recognizes them per the well-known attorney Lionel Hutz: "While anecdotes, hearsay and conjecture may not be the best evidence, they are kinds of evidence." Just take a minute and look up Mr. Hutz's credentials.

    No study proves anything 100 percent. But an anecdote? By itself, taken alone with out other testing or sampling, is 100 percent accurate. And, when enhanced by smoking LEGAL CANNABIS (in the west-coast sun), is over 100-percent accurate.

    Take that Boston-boy! :)
     
    #63 William Redoubt, Sep 25, 2019
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  4. lenjack

    lenjack Active Member

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    Carmakers recommendation is for softer, more comfy ride. Upping it 3 to 5 pounds will give you better mileage, AND better handling, while the hardening of the ride will be barely noticeable. I have not found this to cause added tire wear.
     
    #64 lenjack, Sep 29, 2019
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  5. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Walk yurself down to Pep Boys or whoever, get a $5 tread depth gauge. (y)
     
    #65 Mendel Leisk, Sep 29, 2019
  6. fuzzy1

    fuzzy1 Senior Member

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    Even once a month was too fast. That sounds more like a small bead or valve leak, than permeation through the rubber, so all-nitrogen won't help.
    Comfort is very clearly a factor, and is likely why numerous previous-century cars had too-low pressure recommendations. E.g. my household's Honda and Acura suffered premature edge wear and hydroplaning until I upped the pressures. And the infamous Ford Explorer / Firestone rollovers, which killed a lot of people, which caused in part (along with a half dozen other problems) by a too-low manufacturer pressure recommendation.

    But I'm betting that upping the pressure 3-5 pounds will be more that 'barely noticeable' by numerous drivers and riders. While fine for me, a fair number of others won't like it.
     
    #66 fuzzy1, Sep 29, 2019
    Last edited: Sep 29, 2019
  7. fuzzy1

    fuzzy1 Senior Member

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    Many have done so or similar. Search around, here are just a few examples.

    NHTSA:
    upload_2019-9-29_11-7-3.png


    A university engineering department:
    upload_2019-9-29_11-10-17.png
    An engineering calculator source:
    upload_2019-9-29_11-15-32.png

    A bicycle-specific test:
    upload_2019-9-29_11-12-18.png
     
    #67 fuzzy1, Sep 29, 2019
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  8. bisco

    bisco cookie crumbler

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    sorry, i meant prius specific with LRR tires
     
    #68 bisco, Sep 29, 2019
  9. NewHybridOwner

    NewHybridOwner Active Member

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    If the factory-installed tires were LRR (were they on yours?), wouldn't the specified 35psi on the label be for LRR tires rather than for "regular" tires?
     
    #69 NewHybridOwner, Sep 30, 2019
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  10. CR94

    CR94 Senior Member

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    You can be certain Toyota (among others) tested that too.
     
    #70 CR94, Oct 2, 2019
  11. bisco

    bisco cookie crumbler

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    no doubt
     
    #71 bisco, Oct 3, 2019
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