I recently moved from the east coast to the tornado alley region and the roads here suck at times. Did a ride the other day and the front tire flatted - changed it out and continued on no problem. Got home, and it was flat again the next day. Checked it over, changed it, and then the next day the rear was flat. Found glass in the rear tire and pulled it out, changed it. Decided to further inspect front again, and found a small needle like piece of metal in the tire - pulled it out with needle nose pliers and it went flat. Damn! 4 tubes in no time. WTF? Just griping as never went through this many before - my record was 3 flats on one ride. I use Vredestein Fortezza TriComp and flats are usually a rarity.