I rode 3/4 mile from my house, when I hear "POP! psssssssssssss!" Front tire starting to deflate. Heel the bike around and head home. Halfway up the hill, and had to get off and push the bike home (at 28 degrees, I didn't really feel like changing the tire outside when the warm house was so close).
Got home. Took the tire off. Gave it a through cleaning and going-over. Cleaned the rim. Put on a new (old/patched) tire from the seatbag. As I rode off again, I called to DH "If it goes flat again, I'm calling in sick!"
Got 2.5 miles up the road. Turned onto a side street, and heard the familiar "thud, thud, thud...."
Flat again!!!
Phone out. Call up the DH. "Come rescue me."
Got a whopping 4 miles in.
BTW...didn't call in sick. Called in late....he drove me to work. Patch was/is fine on the second tire. STILL can't find what caused either flat.
grrrrr....