More biking to work, alleluia. Just as I was about to pedal home for the evening, Lupe mildly pointed out that a ugly bubble of inner-tube was poking through the sidewall of the rear tyre. I only had finifs and sawbucks in the ol' wallet, so I booted the tyre with a fiver; belatedly I realised that I kept a single in my patch kit for this very reason. More incentive to take off this bad piece of rubber (two big holes in the past week, and this one on the sidewall is just Bad News).
I am going to replace the tyres on the commute bike -- either the Kogswell or the Dutchess -- with the reflective-sidewall tyres that this guy on Caltrain was telling me about.