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  1. #1
    I hate carnies indybiker01's Avatar
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    Rear tire chunking out

    Schwalwbe Ultremos

    max psi 145

    I run 115-120 psi

    seems to be happeing in the middle of the tire.
    My front tire looks okay. My rear tire is chunking out. Is it due to over inflation? It happened with my Michelin pro race tires but I got 1500 miles out of them. This tire has maybe 600

  2. #2
    Galveston County Texas 10 Wheels's Avatar
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    I can't see the pics.
    [SIZE=1][B]What I like about Texas[/B]
    http://www.youtube.com/watch?v=PGukLuXzH1E

    Set F1re To The Ra1n ( NY Night Rain Ride)
    http://www.youtube.com/watch?v=W7jfcWEkSrI

  3. #3
    I hate carnies indybiker01's Avatar
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    Quote Originally Posted by 10 Wheels View Post
    I can't see the pics.
    i will update as soon as my iphone is done restoring

    *34 minutes to go.....so much for a long bike ride today....

  4. #4
    Galveston County Texas 10 Wheels's Avatar
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    Is the chunking all the way around the tire?
    [SIZE=1][B]What I like about Texas[/B]
    http://www.youtube.com/watch?v=PGukLuXzH1E

    Set F1re To The Ra1n ( NY Night Rain Ride)
    http://www.youtube.com/watch?v=W7jfcWEkSrI

  5. #5
    Senior Member
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    Whether on cars, trucks or bikes, tire chunking is usually caused by under-inflation or overloading. That causes excess tire flex which weakens the bond of the tread to the body plies. In the automotive world heat also comes into play, but I don't believe bike tires get hot enough to matter.

    So, I have two questions.

    1- what's the tire cross section?
    2- what do you weigh?

    You might also compare your weight, width and pressure to the data on the chart here.
    FB
    Chain-L site

    An ounce of diagnosis is worth a pound of cure.

    “Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

    “One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

    WARNING, I'm from New York. Thin skinned people should maintain safe distance.

  6. #6
    Senior Member Looigi's Avatar
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    I've never seen a bike tire chunk unless it was really old and the rubber was hard from age (UV, oxidation, ozone exposure, oil contamination...). Really strange that your Mich Pro3 tires were doing it too. Could it be something with the storage conditions or way you're treating the tires?

  7. #7
    I hate carnies indybiker01's Avatar
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    here are the pics from before my ride and at the 31 mile point when I started to feel a thump and had to be picked up

    1500 miles is acceptable to me on a set of michellin pro race tires....this is my second set of schwalbes. the first set was replaced by shwalbe (actually recalled). They came out with the r.1 which supposed to be fixed.









  8. #8
    Galveston County Texas 10 Wheels's Avatar
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    Cords are broken.
    [SIZE=1][B]What I like about Texas[/B]
    http://www.youtube.com/watch?v=PGukLuXzH1E

    Set F1re To The Ra1n ( NY Night Rain Ride)
    http://www.youtube.com/watch?v=W7jfcWEkSrI

  9. #9
    I hate carnies indybiker01's Avatar
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    Cords are broken.
    I emailed schwalbe. I don't know if this is a warranty issue or not. I will let them decide.

  10. #10
    I hate carnies indybiker01's Avatar
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    Schwalbe has agreed to send me a new tire. In no way am I implying or saying that they admitted it was a product issue. I simply stated the facts and they said they would send me a different tire. I think they listened to my story and took all matters into consideration. I emailed them the info on 8-27-12 and they responded by the next day.

    I will have to buy a matching tire as this is a different tire (they no longer make the R.1) but I am a satisfied customer.

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