Got a flat rear tire. Flipped my three month old p2c upside down to change said tire. In the process of turning it upside down I hear something rattle its way down the down tube. Turn the bike back right side up and hear whatever it is, rattle down the tube again. I will be taking the bike to the bike shop where I purchased it this weekend. #1 any idea what is rattling around in my head tube? #2 Is it safe to still ride?
why not take out the seatpost and see?