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Airwave bike tubes

  • 18-11-2010 1:16pm
    #1
    cojomo2
    Registered Users, Registered Users 2 Posts: 3,220 ✭✭✭


    got a couple of these from crc, was changing a tube lastnight on a brand new bike, was very hard to get the tyre off so was using a couple of spoons as dont have tyre levers..anyway managed to puncture the new tube with the spoon ends when trying to get the last bit of the tyre back on.

    I repaired this, then gave the tube about 3 pumps of my track pump(while outside the tyre). The area near the valve had a big bubble in it and inflated quicker than the rest of the tube, and at pump no. 3 it exploded..

    is this normal, or did I put too much air in the tube while it was outside the tyre? I ask as I am about to order more tubes and there is a good deal on crc on a 10 pack of these airwave tubes...anyone used them?


Comments

  • #2
    kenmc
    Registered Users, Registered Users 2 Posts: 7,277 ✭✭✭kenmc


    sounds like too much air tbh. while you're on crc, order some tyre levers too though.


  • #3
    el Bastardo
    Closed Accounts Posts: 573 ✭✭✭el Bastardo


    I've seen some cheaper tubes bulge, but never explode.

    I was thinking of the same thing a few months ago, just to save a bit of cash, but after reading too many bad reviews, I bought some Schwalbe tubes instead.


  • #4
    cython
    Registered Users, Registered Users 2 Posts: 4,774 ✭✭✭cython


    kenmc wrote: »
    sounds like too much air tbh. while you're on crc, order some tyre levers too though.

    I'd go for this. I don't know what pressure you had in the tube, but I know people who have tried inflating a tube all the way to 100+PSI outside the tyre, only for it to explode at a much lower pressure, and them left with a puzzled look on their face. The simple fact is that tubes can't take too much pressure outside a tyre, as it is the tyre rather than the tube that (other than the valve) takes the majority of the force of the air trying to expand. This is why tyres have have max pressures on their sidewalls, whereas tubes do not. Now it could be the case that before you hit full pressure with the tube in the tyre that the repair would have given way, but the fact that the tube exploded suggests that wasn't the weak point.

    Had the tube been in a tyre, that bulge might have been harmless, and retained by the tyre wall, though a tube giving way after 3 pumps from even a track pump does sound like failing without much pressure all the same.


  • #5
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    Maybe there's a reason the Airwave motto printed on the box is 'lets blow **** up'...


    Having to use spoons levers to refit the tyre suggests you're doing it wrong. When refitting, push the bead of the tyre right into the centre of the rim so that it's closer to the hub. That's often enough to allow you to push the last bit of tyre over the rim using your thumbs pushing outwards from the hub.


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