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@mashton
I can't believe that I am resorting to asking you lot about a puncture, but I am stymied.
I am suffering from a recurrent slow puncture that I just can't figure out.
A brand new rear tyre (Vredestein Fortezza Tricomp) went on a couple of weeks ago, before the Christmas nasty weather. The first time I rode it, it went down almost immediately and I realised that I had fitted the tube badly. Ever since then, I have had a slow puncture on the rear. I have used different tubes, tested the tubes under water for bubbles, checked the tyre multiple times for glass etc, nothing.
If I pump up to 120psi in the evening, I will have lost about 30psi by morning.
What am I missing? It's driving me mad.