In preparation of bringing home my new Ural in a few weeks, I'm trying to put together my spare parts collection to take with me (spark plugs, tubes, etc.). I haven't had a bike in almost 8 years and when I started looking at replacement tubes, most of the sites that I found them on give you the option of a plain old tube or a tube with Dyna Beads (or similar product). I've never heard of them before, is it worth the extra few bucks to get tubes with these things in them or is it just a way for the dealers to make some extra money? I don't mind if it's actually worth it (the description of them kind of sounds like it). Thanks!