I'm not sure how to describe this problem. I'm fixing a puncture on my bike which is a road bike that requires pumping up to about 90psi.
So I fix the puncture, and I pump it up. At first it's okay, but within about maybe 5 minutes suddenly the valve starts releasing air.
I take the tube out, there's no puncture, I pump it up a little bit, it doesn't deflate. I put it back in the wheel and try again. Same again.
It's weird becuase if there was a faulty valve, wouldn't it leak air like all the time and straight away? Not like 5 minutes after I pump it up.
So is my valve busted and I should just get a new tube or is there something I can do to fix it?