Yesterday, left the office, got to my bike and found both tires flat. Popped off the front the front, found a hole at the base of the valve stem- used my spare- pumped, went for the rear. Same problem!! Frick- no second spare, no way to patch. Took my bike up to my office and had to take the bus home- hated it, I hadn’t ridden the bus for three weeks (we have had a GREAT stretch of weather in NorCal). Got some new tubes that night, rode the bus in again in the AM- and again HATED IT- too many people, too slow- no control of my own destiny. Worked the day- replaced the tube and rode home tonight- LOVED it! Those two bus rides probably made me appreciate my ride tonight more than I otherwise would We are all lucky to be able to commute- enjoy every day on the bike!!!!