Escaping innertube...!

dweben
dweben Posts: 34
edited March 2011 in MTB workshop & tech
Hi guys,

Had an interesting one today. Bouncing down Cwmcarn I came to a stop at the end of the second to last section to wait for buddies. Then bam, my innertube pops out of my tyre! Few seconds later the whole thing burst and there's bit of innertube all over the place. :shock:

Question is, why after not having a puncture in the rear for 6 months or so (yes, 6 months!!) would it suddenly go a bit mad? I'm guessing the tyre slipped off the rim but it's never happened before. I swapped the tube out and carried on with no problems. It's a Schwalbe Nobby Nic and Specialised Thin innertube (not sure how thin).

Cwmcarn is quite rocky for XC, is it possible I pinched the side of a rock or seventeen and it's popped the rim off enough for the tube to escape?

9rXTuA

Comments

  • The Northern Monkey
    The Northern Monkey Posts: 19,174
    did te tyre rip?

    if not it sounds like the tyre wasn't seated properly... a bit of side flex in the tyre wall an the inner pops out?
    Santa Cruz Butcher
  • nicklouse
    nicklouse Posts: 50,675
    it can just happen to any tyre and at anny time.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • dweben
    dweben Posts: 34
    Nope, tyre is fine. It's been on the wheel for 6 months with no punctures or issues. I've seen it on DH bikes a couple times but they run pretty low pressures I guess. Mine was 40psi (checked before the ride).

    Ah well, chalk it to random fun :lol:
  • pastey_boy
    pastey_boy Posts: 2,083
    if you think about it ,6 months is a long time to be trapped inside a tyre. maybe the tube was getting a little claustrophobic and was yearning the sweet taste of the fresh spring air. i let my tubes out every 2 months or so, just to be on the safe side.
    Viner Salviati
    Shark Aero Pro
    Px Ti Custom
    Cougar 531
    Sab single speed
    Argon 18 E-112 TT
    One-one Ti 456 Evo
    Ridley Cheetah TT
    Orange Clockwork 2007 ltd ed
    Yeti ASR 5
    Cove Hummer XC Ti
  • lesz42
    lesz42 Posts: 690
    pastey_boy wrote:
    if you think about it ,6 months is a long time to be trapped inside a tyre. maybe the tube was getting a little claustrophobic and was yearning the sweet taste of the fresh spring air. i let my tubes out every 2 months or so, just to be on the safe side.



    LOL :lol: lol
    Giant Trance X0 (08) Reverb, Hope Hoops 5.1D, XT brakes, RQ BC, Works Components headset 1.5
  • Aldo001
    Aldo001 Posts: 251
    Good grief! That photo looks insane looks insane :shock:
    My Carrera Kraken 09
  • ride_whenever
    ride_whenever Posts: 13,279
    I've done that riding on the flat...
    Neeermad
    Carbon 456
    456 lefty
    Pompino
    White Inbred
  • pastey_boy
    pastey_boy Posts: 2,083
    in all seriousness just be thankful it was the rear and not the front.
    Viner Salviati
    Shark Aero Pro
    Px Ti Custom
    Cougar 531
    Sab single speed
    Argon 18 E-112 TT
    One-one Ti 456 Evo
    Ridley Cheetah TT
    Orange Clockwork 2007 ltd ed
    Yeti ASR 5
    Cove Hummer XC Ti
  • dweben
    dweben Posts: 34
    Heh yeah I was happy it happened while I was waiting for my buddies to catch up. I had just done a fast rocky long section... coming off would have been like falling onto a cheesegrater! :shock:

    Kinda looks like my poors bikes guts spilled all over the shop...
  • The Rookie
    The Rookie Posts: 27,812
    Gutted that it had let you down? :?

    Simon-
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.

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