Tried to go for a ride today, and I ended up throwing out 3 tubes which kept me from riding. 2 of the tubes went bad from tearing where the valve attaches to the tube itself. So I figure I'll patch up the hole in my last tube and stop at the LBS on my ride since I was going past it and pick up a few spares. The my third tube which went bad on my ride Sunday had so many holes in it that I ran out of patches! Not that I started with a new patch kit. So now I am unable to ride since I don't have 2 tubes or patches to get to the LBS. I'm doing my first metric century this Sunday and was hoping to use today as day for prepping for it. I work night shifts tonight and tomorrow and won't be able to get a good ride in Thursday or Friday. Saturday I just plan on doing a warm up ride, nothing too significant since I've only done a half dozen 50 mile rides. I need to get some new tubes/tires that won't get flats or go bad like this. One of my tires on the Sunday ride even had the valve tear as I was topping it off when I replaced the rear wheel that went flat. Why does this keep happening?