Well, I tried a new cheap Chen Shin tire (just like the old one before the one that got the flats). No Flats today. Hmmm. I think it is because the cheap tire has a beefier sidewall. I will watch it the next few days and see how it rides out. It will really be funny if 15 $ tire beats out the $30 tire. I think the sidewall is the key. All my flats were in the sidewall portion of the tube. I even had a rip in the sidewall of the last tire that was verging on a blowout when i switched tires. I think with all the rocks and stuff in the bikelanes here the beefier sidewall is probably more important on a commuter bike than a light tire with a very thin sidewall. Well, I guess I will see over the next week whether or not this is a better solution but it is already ahead of the last tire. I couldn't get through a single commute (one way) without a flat. Nice cool commute in this morning. No one honked at me, I kept a good speed, and the bike did real good until I realized the back wheel had slid over and was rubbing the left chainstay. I must not have pulled the wheel all the way back in when I changed it Saturday. Oh well, I guess I have a good excuse for going slower on the commute now.