Crap. Earlier this week, nice cool morning ride. For two blocks. Then my bike started feeling like it was hinging in the middle, then it felt heavy and dead in the back. Shoot, flat. No time to change it so I turned around and walked briskly home and took the truck to work.

Took the time that evening to rotate the tires (they have about 1600 miles on them and the back is more worn than the front but still serviceable.) The rear tube was not only flat from a rather large 1/2" by 1/8" wide shard of glass stuck in the tire, but it looked chaffed and had many tiny cracks like it was dry so I replaced it. Had to use pliers to get the glass out of the tire, and patched it from the inside. It felt good to ride it on Friday.

Our weather has been mild for the San Fernando Valley/L.A. I don't think it's been 108f yet, and has maybe hit 100 once or twice all month. The humidity is high though and I sweat bullets going home.

And I think it is time to start looking into new 700x28c tires...