I've put over 16000 miles on my bike in the last year and a half.....and I've had FOUR flat tires! This seems like more than my share. All have been due to road debris. #1 roofing nail in front, #2 nail in rear, #3 slash in front tire nearly down to cords, I assume I ran over something sharp (the tire didn't go flat, but due to damage I replaced it) #4 just two days ago, something that resembled a T in cross section imbedded in rear tire. Went totally flat in about 10 minutes. I won't even mention the rear tire I just plain wore out WHAT THE HELL!!! Anyone else have this many flats?