New tyres, two blow outs
Today I fitted Schwalbe Durano S tyres (23 mm) onto Mavic CXP22 rims. No problem fitting them and inflating them up to around 100psi. However, within one mile of riding I'd had a front wheel blow out. Rotten luck but no harm done so I set about replacing the tube (Continental 700 x 18-25). As I was inflating the tube it blew again. At which point I gave up and walked home.
Any idea what's going on here? Any compatibility problem between my rims, tyres and tubes? Or am I commiting some schoolboy error? I've since noticed a small tear in the wall of the tyre and I'm not sure whether this is a likely root cause or a symptom of the blow out. I've changed numerous tubes before but this is the first time I've switched to new tyres having previously used 25mm Specialized All Condition.
Any idea what's going on here? Any compatibility problem between my rims, tyres and tubes? Or am I commiting some schoolboy error? I've since noticed a small tear in the wall of the tyre and I'm not sure whether this is a likely root cause or a symptom of the blow out. I've changed numerous tubes before but this is the first time I've switched to new tyres having previously used 25mm Specialized All Condition.
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typically that's likely to mean the tube was nipped between rim and tyre bead, as you pump it up, the tube forces the tyre off the rim, bang
less likely are things like...
- damaged tyre - you mention a tear in the tyre, if it's all the way through the casing and long enough, it could be the cause
- damaged/worn rim
- bad rim tape
when changing tubes, it's always worth noting where the puncture is with respect to tyre and rim, then if it does recur you can tell if it was the same place and investigate
This is exactly how it happened to me a couple of weeks ago, and at least part of the reason (I suspect) was re-using a tube that had already done service in a larger profile tyre - as a result, it was relatively easy to get a bit of it pinched under the bead. Now I notice you've gone from a 25 to a 23mm section tyre . . .
XM-057 rigid 29er
You just need to make sure that the tyre bead is correctly seated all the way round the rim and that the inner is not trapped.
P.S - If I get an issue on my next outing I'm blaming you for making me write this