Tough commute yesterday and one of my slowest of the year. Battled stiff headwinds all the way to work, and then 98 F temperatures on the way home. Halfway there, I got a flat on my front tire, which may have been the first time I've ever flatted a front tire while riding. I found out real quickly why the conventional wisdom is to put your best tire on the front, as I was making a turn at the time and my bike nearly went over. I was crossing a large street and made it to the other side, pulling up in the shade under a large tree to fix the flat. Got the tube replaced and filled with a CO2 cartridge, but the tube was bad and immediately went flat. Fortunately I had a second spare tube for a very random reason -- I had stuffed it in my seatbag that morning to fill up some space. The second tube held, so I made it home, about 20 minutes slower than usual due to the heat and tire repairs.

That flat convinced me to replace the Rivendell Roughy Tuffys I've had on that bike for a few weeks. I don't like the tires as they are heavy and seem to have a lot of rolling resistance. My average speeds dropped about 1 mph after I installed them, but I had kept them on the bike because I figured, if nothing else, they should be durable and flat resistant. I hate slow, heavy tires.