I decided to wait until I needed tires to give the dark side a try. The place I bought my bike has a fairly new Avid ENViger already mounted on a rim. I don't think it's the run flat. He is willing to sell it to me for $75.00. I am riding with a group to Arkansas in June for week, would you feel comfortable using a non run flat to go that far? Was just wondering if you think this is worth trying or to just get a rim and then buy a top pick run flat? Thanks for your advice.