just started commuting - blow out!- Mtbr.com
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  1. #1
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    just started commuting - blow out!

    I've been commuting for a couple of weeks and just had my first flat. I've had plenty of flats on the trails.. but what concerns me about this, was that it was a complete blow out . It sounded like a shot gun went off... which I have never had before. Before I go and replace the tube and get going.. is there something I should look for that might have caused this... or is it a "normal" occurrence in commuting / road biking.

    My setup: My commuter is a Vassago Jabberwocky (29er) singlespeed with Kenda Kross 700X40 tires: http://www.nashbar.com/profile.cfm?c...kking%2FHybrid

    I am running some 26 inch mtb tubes.

    Any thoughts?
    Last edited by bworks; 05-12-2008 at 11:12 AM.

  2. #2
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    I've only had that happen when the sidewall on an old tire failed. It was parked right next to my desk at the time!
    Work is the curse of the biking classes.

  3. #3
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    Hmmmmmm. Upon inspection of the tire, I noticed a section by the bead that was shredding. I thought maybe it happened during the blowout, but maybe there is a reason those tires are 3.99....

  4. #4
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    I had it happen once when i did not have the tire and tube properly seated and the tire actually pinched the tube and it poped like a balloon. You would have thought the tire would have blown on the first ride after mounting if that had been the case.

  5. #5
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    Quote Originally Posted by gnslr
    I had it happen once when i did not have the tire and tube properly seated and the tire actually pinched the tube and it poped like a balloon. You would have thought the tire would have blown on the first ride after mounting if that had been the case.
    I thought about that as well. I've only put about 50 miles on them, but like you said... if that were the case, I would have thought it would have happened earlier. I did pump my tires up for the first time since I installed them just before I left this morning to 65-70psi. That was the same pressure as when I first put them on 2 weeks ago. Maybe the MTB tube can't take those pressures?

  6. #6
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    depending on the size of the tire you would think the mtb tube would work just fine but if you are running a 1.25 tire and a tube for a 2.3 it may not properly inflate

  7. #7
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    It's probably because he is running a 26" tube on 29" wheels

    $4 tires probably aren't too good either.

  8. #8
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    Quote Originally Posted by gnslr
    I had it happen once when i did not have the tire and tube properly seated and the tire actually pinched the tube and it poped like a balloon. You would have thought the tire would have blown on the first ride after mounting if that had been the case.
    Exact same thing happened to me wheni flatted at night, shared the corn out of me.

    wayne
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  9. #9
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    Quote Originally Posted by comptiger5000
    It's probably because he is running a 26" tube on 29" wheels

    $4 tires probably aren't too good either.
    yeah, a red flag went up for me too. why are you using 26" tubes?

  10. #10

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    Recently someone I was riding with fell lightly, then a minute later the front tire blew out. We guessed that the tire sidewall must have torn a little on the first fall, but the blowout was very bad, because he went flying over the bars and chipped his hip and bruised his kidney.
    Check your tires after a crash so you don't get blowouts on trails!

  11. #11
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    Quote Originally Posted by comptiger5000
    It's probably because he is running a 26" tube on 29" wheels

    $4 tires probably aren't too good either.
    26" tubes work fine in 29" wheels. When you inflate them (out of the tire) they expand in diameter and slip in easily. I've been running a 26" tube in a 2.1 Nanoraptor for a couple years now.

    $4 tires on the other hand, dunno about those. I'd guess they're tough as nails with steel beads, but maybe they're just crappy?

    Plum
    This post is in 3B, three beers and it looks good eh!

  12. #12

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    Quote Originally Posted by bworks
    Hmmmmmm. Upon inspection of the tire, I noticed a section by the bead that was shredding. I thought maybe it happened during the blowout, but maybe there is a reason those tires are 3.99....
    Yea, well... that'll do it. Ever hear the expression "You get what you pay for"?

    A good tire is about 20-40 bucks. Mine are 30ish bucks, I think I paid for each one.

  13. #13
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    Happened to me on my first commute. In my case I dented to hell out of the rim, so a section of the sidewall was unsupported. About a mile later the tube went BANG. Definitely wakes you up.

  14. #14

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    My front tyre blew out the other day . . . upon closer inspection I had ridden over a 4 inch roofing nail, gone through the tyre, both sides of the tube and finally, the rim. Guess I should have tried to avoid it.

  15. #15
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    Mine happened when i was going 21mph on a sidewalk luckily my tire stayed on the rim enought to offer traction that and i was on my way to a LBS and was within 400yds of it.

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