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Please help. :(
Can you identify these types of punctures?
They're not snake bites. They always occur at the same place about 3 inches away from the valve, on the inside of the tube (the side directed towards the rim) in a parallel direction to the rim (not across like typical snake bites).
I've changed the rim, tubes, rim tape, always the same. The only constant is the tire, but I've inspected and felt the inside of the tire and there is nothing.
Already destroyed 3 tubes on the day of install, after a short ride. Any ideas? I'm completely clueless.