I am really having problems here. I went 100's of miles early in the season with no problems. Since I have had 2 busted spokes and so many flats I have lost count. I am really good at not hitting chuckholes or bumps, I am very careful iwth it. I have a 2005 Raleigh Grand prix with 700c x 25 tires. I have been riding along on smooth road when the spokes popped. I keep it clean and well lubed. What else can I do. I pick up students next week and cannot be late to work anymore. I am just over 200 lbs and was up to 235 when I bought the bike. Does evey one have some problem about 1 or twice per week? Today my bike is parked in my office. Everything was fine about an hour ago. I change and get ready to leave and the damn tire is flat. I can change it and I even have a pump in my office but now I have to wait till someone calls me back so they know I am going to be late. Just dang frustrating.