Interesting. In spring, my commuter had Panaracer's Urban Max. They had replaced a set of Urban max that lasted forever. However, I flatted the front 3 times in a week (on my commute, the streets are paved with glass -- a casino and way too many bars). All on the same tire.
I replaced the Urban Max with a RiBMo and nary a flat in 4K+ miles. People seem to either find the tough Panaracers either bullet proof or quick to flat. I wonder if it is a quality control issue? Except for that one Urban Max, my Panaracers (Urban Max and RiBMo, knock on wood) have been without fault. And, really, glass is an everyday occurrence.
This winter I'm going Schwalbe Marathon Winter. I've heard good things about the Marathon line.




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. I wish Schwalbe made Marathon Plus' for 650c wheels, I'd use them on the SS in a shot. Still, I have them on my 'runaround' bike which has 700c wheels, so I should be fine for the winter.
