It’s the front wheel of a “renewed” A Line, with the tyre and inner tube as fitted to the bike which I’ve never removed from the rim before, and it’s always been pumped up.
So I had a puncture, turns out the hole is on what I thought was the “inner” side of the tube, the side facing the inside of the rim. There was a small 1-2mm shallow “crater” on the tube with a tiny hole in the middle of it. I checked the rim, couldn’t find anything sharp or protruding which could have caused the puncture, although I did notice the plastic rim tape had quite deep depressions at the spoke holes, so patched the tube. The next morning I pumped up the tyre and after riding for 5 minutes the tube went psst and instant deflation.
This time the hole was more of a tear, and I thought maybe the tube had stretched too much at the rim tape depressions so I stuck on some Velox rim tape and patched the tube and put the tube back in the tyre.
After about 30 min after full inflation, it went bang (I was in the next room with doors shut). There was a split in the tyre side wall at the bead and the the tube had blown out.
I couldn’t think what was the cause, as the holes didn’t align with the spoke holes, and they were more to one side instead of being in the centre (not at 6 o’clock), I thought maybe the tube was being pinched by the tyre but I think I did make sure it wasn’t.
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It’s the front wheel of a “renewed” A Line, with the tyre and inner tube as fitted to the bike which I’ve never removed from the rim before, and it’s always been pumped up.
So I had a puncture, turns out the hole is on what I thought was the “inner” side of the tube, the side facing the inside of the rim. There was a small 1-2mm shallow “crater” on the tube with a tiny hole in the middle of it. I checked the rim, couldn’t find anything sharp or protruding which could have caused the puncture, although I did notice the plastic rim tape had quite deep depressions at the spoke holes, so patched the tube. The next morning I pumped up the tyre and after riding for 5 minutes the tube went psst and instant deflation.
This time the hole was more of a tear, and I thought maybe the tube had stretched too much at the rim tape depressions so I stuck on some Velox rim tape and patched the tube and put the tube back in the tyre.
After about 30 min after full inflation, it went bang (I was in the next room with doors shut). There was a split in the tyre side wall at the bead and the the tube had blown out.
I couldn’t think what was the cause, as the holes didn’t align with the spoke holes, and they were more to one side instead of being in the centre (not at 6 o’clock), I thought maybe the tube was being pinched by the tyre but I think I did make sure it wasn’t.
But after reading https://www.reddit.com/r/Brompton/comments/1p4yp0i/inner_tube_constantly_bursting/
I think the the problem was the tyre.
Tyre: Marathon Racer
Inner tube: Impact