Thanks for all the suggestions. I wound up going to the Hub/Zoo, quite an
interesting spot. I picked up two spares, so I should be good for next time.

The spare I had was a road tube for my other bike, and I realized I had
problems when there were an extra couple inches of tube compared to tire.

By the way, my problem wasn't a puncture, it was a valve that separated from
the tube. So I can still say that since I've started using Mr. Tuffies, I
haven't had a puncture.

Ken Zirkel
Web Communications Specialist
Brown University
Providence, RI
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