A month ago, I replaced my happily used-up front tire. Yesterday, after less than 300 miles on it, it picked up a huge screw, dead center. I replaced it with another new tire. Dammit. Then, when I got home, I found a second screw, this one in the rear tire. Is this just a cruel downside to riding, or is conventional wisdom skewed- and it really is perfectly acceptable to patch a tire with a simple puncture? I've used plugs, patches, and fix-a-flat with 100 percent success in jeeps and trucks, but have not tried any of them on a motorcycle tire.