jack

Thank you. Well, the first rupture happened while riding. The second rupture happened when I replaced the inner tube, and didn't notice that the tyre had a rip in. Then I replaced the tyre AND the inner tube, and didn't notice that the tyre had popped out of the frame while pumping. Then I repeated the exercise more carefully, and apparently the valve on the fourth inner tube was buggered, because it was all fine until I took the pump off and then there was another massive BANG! So I have (AFAICT) got four COMPLETELY DIFFERENT things wrong, but that doesn't make me feel more competent :)

I almost long for the days when I used to get slow punctures and not fix them properly! :)