I recently went to get my bike ready for a ride, and I noticed right away that my rear tire had completely deflated. I took off the wheel, and took out the tube and checked it for puncture but didn't find anything. So, I put the tube back in and inflated the tire. As usual I had the tube inflated to 120psi, the max for the tire.
I went on a ride, it did not go flat on me. I put my bike away, and lo and behold the next time I looked it was completely deflated again.
What causes an inner tube to deflate on its own?
It also gets very hot in my garage. Does heat play a part?
I assume a new tube will do the trick. Is there a reason to worry, or can I safely ignore the problem and just inflate the tube every time?