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Try cut a giant patch from old tube. To expand on this suggestion, it is possible to make your own patches. You'll need: A dead tube with a hole that needs a patch larger than anything you have available A second dead tube as a material donor Sharp scissors And all the usual parts for patching a tube, including vulcanising fluid (ie glue) Here's the ...


Narrow tyres require higher pressure as they have smaller contact area. Would guess you have something bad around - nipples, sharp edge, etc. I am running Schwalbe & Conti 23x622 for a few months now and have no problems to start @8.5 bars (limit on petrol stations) except they drop to 5-6 in few days - normal behaviour.

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