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Michelin Energy Saver A/S.. what PSI?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by cyclopathic, May 7, 2011.

  1. cyclopathic

    cyclopathic Senior Member

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    have ~3,000 on them. Grip well, good fuel economy, great in rain.. only complain the sidewalls are too soft, even at 42PSI. B/C of that car rolls quite a bit through the corners and from side to side over bumps.

    What PSI are you guys running them at?
     
    #1 cyclopathic, May 7, 2011
  2. jdcollins5

    jdcollins5 Senior Member

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    Look on the side of the tire and find the max sidewall pressure. Many on here run their tires up to the max pressure. This is a cold pressure rating and takes in to account the increase in pressure as the tire warms up.
     
    #2 jdcollins5, May 7, 2011
  3. cyclopathic

    cyclopathic Senior Member

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    they are rated at 44PSI.. problem is they don't grip when you pump it up to the limit, had traction working full time in light rain.

    Dropped to 42 front/38 rear seems the best so far.
     
    #3 cyclopathic, May 9, 2011
  4. jdcollins5

    jdcollins5 Senior Member

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    I have the OEM Yokohama Avid's and they have the same 44 psi max rating. I tried running mine this high but the ride was too hard for me. I backed down to 40 front / 38 rear, similar to yours.
     
    #4 jdcollins5, May 9, 2011
  5. cyclopathic

    cyclopathic Senior Member

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    The Michelin's sidewalls are alot softer then OEM Avid's, the ride at 44PSI was comfortable.. just don't grip.
     
    #5 cyclopathic, May 9, 2011
  6. jdcollins5

    jdcollins5 Senior Member

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    cyclopathic,

    Let me know how you like the Energy Savers after you have some more run time on them as this is what I plan to put on when the Avid's need replacing.

    Thanks,

    Dwight
     
    #6 jdcollins5, May 9, 2011
  7. Hal W

    Hal W New Member

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    The Michelin Energy savers are a all season tire, so this is probably why you are losing grip? Hal
     
    #7 Hal W, May 9, 2011
  8. cyclopathic

    cyclopathic Senior Member

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    I think it has to do more with over-inflation.. the grip really well otherwise

    I like them alot.. and they improved my MPG by at least 3-5MPG. Last tank was 59.8, and I usually get ~55-56. They also very good in rain. People complain about them in snow but we only have snow a couple times a year, and for you it would not be an issue at all.

    A couple comments:
    - to get better MPG you'd need to adjust your P&G as there are alot more energy to recover in braking. My wife does not get as much improvement as I
    - when compare to Avids they have soft sidewalls which contribute to "negatives" of Prius handling, wind stability and additional body roll. "Optimal" pressure seems to be helping with this aspect good luck
     
    #8 cyclopathic, May 10, 2011
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  9. GSW

    GSW PRIUS POWER

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    I just replace my Yoko Avid's with the Michelin ES A/S and wow what a difference. I drive the same grooved roads every day and there were no signs of tramiling. The Yoko's have been trameling since they were brand new. The LRR is amazing. Air pressure 39F, 38R.
     
    #9 GSW, May 18, 2012
  10. KK6PD

    KK6PD _ . _ . / _ _ . _

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    42/40
     
    #10 KK6PD, May 18, 2012
  11. EdyJun

    EdyJun Junior Member

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    I take it these are tire pressures measured at a cold tire?
     
    #11 EdyJun, May 18, 2012
  12. hlunde

    hlunde Member

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    While you can realize improved fuel mileage at higher inflation pressures, higher pressures reduce the area of the contact patch. This means fewer sipes in contact with the road and diminished wet grip at low speeds. This is different than wet grip at high speeds where hydroplaning is a concern.
     
    #12 hlunde, May 18, 2012
  13. Hank101

    Hank101 Member

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    I had the ES's for about 50 miles and then had to trade them in due to very rough ride. Lower psi helped but they were very "jittery" in ride. Maybe I had a bad set or something. I did notice a 2mpg increase.
     
    #13 Hank101, May 19, 2012
  14. The Critic

    The Critic Resident Critic

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    I noticed the same jittery ride. However it has mostly disappeared after 3500 miles.

    MB860 ? 2
     
    #14 The Critic, May 19, 2012
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