These things come in... fours?

I lost yet another tube on my bike, this time the rear one, but it wasn't noticeable until about as far from home as I get on my daily ride. I pushed my bike about twenty blocks down Aurora Ave., the ugly, six-lane arterial that's basically a loud, smelly eyesore the length of the North End and into the next county.

And was this construction debris? I couldn't find any in my tire, despite two inspections in daylight. Was it a pinch flat? I did jump a curb to avoid construction workers in the street putting on their gear for the day. Or was it just that tube's time, as Random says inevitably happens? I'll never know, and I'll never care as long as I get to ride more.

Which reminds me, I need to moisturize my hands after all that soap and degreaser.