I need some information from you guys out there. I am5'10" tall. i weigh 210 lbs. I have bought every brand tire on the market possible today. Question i inflate the tires at least 5 lbs less than the maxium tire pressure required by manufacture. i ride the tires approximatly 200 miles when that evil flat area apears in the middle of the tire. Am i under inflating the tires, or is it my weight. is anyone out there, that is my weight having the same problem. I then rotate the tires front to back, and there it is again, sometimes sooner. Depending on the brand tire.