I have a pair of Schwalbe tubes that are 7-8 years old.
Took em out of the box for the first time last week. Rode 50 plus miles with no problems.
6 days later it is really soft, but when I took it of the rim and put it in a bucket of water, there was no leak.
Losing most air after 6 days for a 7-8 year old tube. Is that normal?
Problem solved. After putting the tube in a bucket with water and let it sit for a awhile, little bubbles showed up at the valve core. Turned out it has loosened a bit.
After I tightened it, it stopped forming air bubbles
In my nearly 50 years of fixing flats, I had never come across this scenario.
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