I didn't notice that my two tires on my riding mower were flat until one brother of mine pointed it out to me. My thought ran like this. How could I not have noticed? I had to help him patch up the tires. I had to do this before I could even think of moving the mower to another shed. He let me know he had planned on doing something else before he had to fix this ****** problem of mine. I felt rather low after that.