i was reading an article in MXA about unsprung wieght, and they were talking about a 6:1 theory. that being a one pound reduction in unsprung wieght is equal to a 6 pound reduction in sprung wieght. i dont know if thats true, but i would like to run the lightest tires and chain guide i can. does anyone know anything about this subject? i.e, which tires are lightest, which chainguide and durable sprockets are the lightest, and does this improve handling or does it help the bike handle bumps better? i think im going to lose my brake gaurds at the track tomorrow ( ), to see if i feel any difference. anyone know about this "unsprung" business?