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Got new tires!

Discussion in 'Gen 2 Prius Accessories & Modifications' started by hobbit, Jan 2, 2010.

  1. bordeaaj

    bordeaaj Junior Member

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    Well, I'll be damned! Very nice new feature!!! I stand corrected on Consumer Reports...your point has been well taken and my original post modified to qualify the statement in question! You might have to correct me again, however, as I am seeing 9 of the 17 with equal or better snow traction and ice braking than the Hankook and 8 clearly worse.
     
  2. Boo

    Boo Boola Boola Member

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    I'm not sure if we're approaching or describing the counting the same way. Anyway, here's my counting method:

    The Hankook Optimo H727 A/S tire got a "Very Good" rating for snow traction and a "Very Good" for ice braking.

    When I looked at the snow and ice ratings of the 17 winter tires tested, if a winter tire got a "Very Good" rating for both snow traction and ice braking, then I considered the Hankook to be equal to the winter tire in snow and ice.

    And if a winter tire got less than a "Very Good" rating for either or both snow traction and/or ice braking, then I considered the Hankook to be better than the winter tire in snow and ice.

    Alternatively, you can assign points to Consumer Reports' descriptive ratings, e.g., 5 points for "Excellent", 4 points for "Very Good", 3 points for "Good", 2 points for "Fair" and 1 point for "Poor", and then total and compare the combined rating points in snow and ice for each tire. Using this method, the Hankook gets 8 total combined points for snow and ice. So if a winter tire also got 8 total snow and ice points, then I considered the Hankook to be its equal in snow and ice. And if a winter tire got fewer than 8 total snow and ice points, then I considered the Hankook to be better than the winter tire in snow and ice.

    Either way, I count the Hankook Optimo H727 A/S tire as having equal or better snow and ice performance than 12 of the 17 winter tires tested.

    Here's my list by Consumer Reports winter tire # of the 12 winter tires that the Hankook equaled (H =) or bettered (H +) in snow and ice performance:

    #4 (H +)
    #5 (H =)
    #6 (H =)
    #7 (H =)
    #8 (H +)
    #10 (H +)
    #11 (H +)
    #13 (H =)
    #14 (H +)
    #15 (H +)
    #16 (H +)
    #17 (H +)

    Granted, the snow and ice performance of the Hankook Optimo H727 is a singular exception among A/S tires. No other A/S tire tested comes close or can make the claim that it performs as well or better in snow and ice than most of the winter tires tested.
     
  3. hobbit

    hobbit Senior Member

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    I probably didn't do enough longish-distance driving in snow
    over the winter to really say for sure about the A/Ses. I did
    go do the usual spinning around in an empty parking lot that still
    had maybe 4 - 5 inches of snow cover, which was a blast, and other
    than the intentional sideways travel directions the car tracked
    fine and could start and stop competently and get back up the
    badly-plowed hill leading into to said lot afterward. I didn't
    have any instances of genuinely needing to panic-stop, but
    other normal driving around town didn't yield any surprises or
    disappointments. So that may or may not be helpful ... I'm
    looking forward to *warm-weather* driving, which we've already
    had a bit of in the northeast and I'm already seeing low to mid
    sixties on *highway* segments. I'm hoping to push 70 tank-to-tank
    in mixed backroads/interstate, but we'll see.
    .
    I'd say qualitatively, as I did for the Hydroedges, that they're
    still way better than the OEM Integrities. [Hmmm. I wonder if
    the guy I gave those to ever actually used them..]
    .
    If my tires were going to burst at 50 - 60 psi, they'd do it when
    hitting one of those sharp-edged, exactly-tire-sized potholes that
    I couldn't otherwise avoid that have sprouted *everywhere* over the
    winter and recent floods. Patch crews are sadly underfunded these
    days, so my track tends to wander rather crazily within my lane
    trying to avoid most of that stuff. Occasionally whamming into one
    of those puts a lot more pulse stress on the tire and rim than me
    standing next to it huffing away on my hand pump ever could.
    .
    _H*
     
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  4. mmichaell

    mmichaell Member

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    You know, I wonder if the H727 is more of a winter tire than an A/S tire. Can someone find out more of the specs, e.g. tire life, silica compound, comfort/handling, etc.? If for example the tire has low life, is very cushy, has special silica compound for low-temperatures, it would suggest (in my mind anyways) that it is more of a winter tire than an all-season.

    Just a thought fwiw.
     
  5. Boo

    Boo Boola Boola Member

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    I'm confused by your questions about the Hankook Optimo H727 because I think they have already been answered.

    All you have to do is read the Consumer Reports November 2009 tire tests that I attached above, and that I'll re-attach here:

    [​IMG] Consumer_Reports_Nov._2009_Tire_Tests-1.doc

    The CR tests give absolute, cross-category ratings for the H727 and all the tested tires for Dry Braking, Wet Braking, Handling, Hydroplaning, Snow Traction, Ice Braking, Ride Comfort, Noise, Rolling Resistance and Tread Life.
     
  6. bordeaaj

    bordeaaj Junior Member

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    Gotcha. And thanks again for the update on how they review...I've been a subscription and online member for so long I may have never noticed the changes!
     
  7. hobbit

    hobbit Senior Member

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    I just cross-rotated the ES-A/Ses yesterday. No perceptible
    difference in wear yet, including inner vs. outer on the rears
    due to camber. No difference in road feel afterward. Front-
    to-back "squirm" speed differential as seen in the diamond is
    oddly greater on the highway now, which is puzzling because that
    would imply that the fronts became *smaller* after rotation but
    since they used to be the rears and not under torque loads that
    would wear off more tread, they should still be *bigger*! And this
    is after re-balancing the pressures -- maybe I didn't set them to
    quite the same delta front to back. Well, that's still a very
    minor subtlety, and it's probably going to take 20K or so before
    any of the long-term effects start making themselves apparent.
    .
    Let's just hope I can keep the thing in decent alignment over this
    winter's generous crop of potholes...
    .
    _H*
     
  8. olerox

    olerox Junior Member

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    Hi folks, thanks for the information and discussion about the Hankook OPTIMO H727 tires. As an enthusiastic new Prius owner I have read about 1,000 great PC posts about what people think about replacement tires. My GY Integreties are so deafening and stiff (with the boost in PSI) at 36K miles I just have to replace them before I get an alignment.

    Great car! Great forum!
     
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