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  1. #1
    Senior Member G4teamG's Avatar
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    Getting flats at 90 psi...?

    Guys, I just installed a new set of Specialized Nimbus Ex Armadillos with new 26x1.50 tubes. About 5 minutes after installation the front tire blew out at 90 psi with no weight on top). Took it off and repaired tube. In the middle of installation the rear blew out as well. I repaired the rear as well and checked the rim for some type of obstruction. There was none. I re-inflated to 65 pounds and had no further problems. Should I get some tire liners? Will this correct the problem? I want to be able to ride at approx. 100 psi. I weigh 205. Thanks!

  2. #2
    Guy with bike
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    Where were the holes at?

  3. #3
    Senior Member G4teamG's Avatar
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    The holes were alongside the area that contacts the rim spokes. The rim already had a thin strip of liner. I just added another strip and I'm going to go test it again.

  4. #4
    Campy or bust :p cryogenic's Avatar
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    I thought those tires were meant for 85psi? Generally, though, they'll hold more than what the sidewall says. Kinda makes me wonder if the issue is the tube or the rim perhaps?

  5. #5
    Desert tortise lsits's Avatar
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    Get some good quality cloth rim tape. Makes all the difference.
    Wish I didn't know now what I didn't know then. - Bob Seger

  6. #6
    Senior Member madhouse's Avatar
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    I had 10 flats in the first 60 miles on my first road bike... It came with insufficient rim strips... Once those were replace my flat situation went away!

  7. #7
    Senior Member G4teamG's Avatar
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    Just did a quick 12 mile ride. No problems but it seems that the rear tire seems to flex a little. Guess that's the nature of the Kevlar. The side wall reads that the psi can go up to 100, now as far as the kenda tubes...hmm. Cloth rim tape sounds like a good idea, thanks guys.

  8. #8
    Caffeinated. Camel's Avatar
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    Quote Originally Posted by madhouse
    I had 10 flats in the first 60 miles on my first road bike... It came with insufficient rim strips... Once those were replace my flat situation went away!
    HA! Exactly the same happened w/me! No joke!

    I was about to give up on biking in general too, untill a buddy pointed out the rim strip problem to me.

  9. #9
    aspiring dirtbag commuter max-a-mill's Avatar
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    i am wondering if you are pinching the tube between the tire and the rim when you first put them together?

    if you do this as soon as you get some decent pressure in there, BOOM they explode and scare the ***** out of you.

    what i do to avoid this is: put about 5-10 psi in you tire then take the tire and check the bead the whole way around the tire by twisiting it back and forth to make sure your tube is not stuck between the tire bead and the rim. once your sure the tube isn't getting pinched pump her up!
    - the revolution will not be motorized -

  10. #10
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    Those sorts of flats can be mysterious. I sometimes switch a tire to a different rim, and get zero flats. Spoke ends, rough areas on the rim, the rim strip, and the shape/size/design of the rim can cause problems with tire "a" and no problems with tire "b".

    I switched from generic tubes to Continental tubes, and have far fewer flats than before.

  11. #11
    Senior Member billh's Avatar
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    Could have been bad rim tape. Could have been a pinched tube somewhere. Hard to tell. I've had a lot of flats shortly after installing new . . . anything on the wheel. Seems like once I get a good installation, I go for a long, long time without a flat.

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