These are NOT foldable UST (tubeless) Tires. They are solid rubber, heavy, piece of crap tires that should be sold for $.25 cents a piece. It took me a long time to get my money back on them, as they are nothing close to what is advertised, and they are still advertising them! In my book, that is fraud, as I have made amazon and Nashbar both aware of the problem. DO NOT BUY THESE!