I'm currently riding Conti Grand Prix 4 season, which are nice riding tires that I really like. No flats so far (between 2-400 miles I'd guess). BUT, that no flats is a darn good thing because they are a MAJOR PITA to install (to the tune of 15-30minutes a TIRE in my living room to switch them to my new rims after riding them for a couple hundred miles).
I'll probably be trying something a bit more forgiving to get on and off next time around. Not sure if the standard Grand Prix (rather than the 4 season) have the same issue or not.



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