I'm kinda upset with my tires...they're about amonth old and 2 flats (both seem to be from glass particles)...Continental Gatorskins...with that name and $40 per tire...I was hoping for more. I don't seem to be bonking on the commute, so I may add flatstrips and some slime if things don't improve. either that or invest in quickrelease skewers (both of my wheels are bolt-on)