Heard a loud pop today whilst riding, like a party popper.
Got off the bike (rear tyre was wet),and noticed a pin hole in the rear tread with bubbles forming (great a puncture

)
I left the bike from about 11am -5pm and checked the tyre pressure ~30 psi?
Is it just a slow puncture? I would have thought the tyre would have gone flat in that time frame?
Has the rear tyre contracted/cooled and closed the puncture?
Tah