I bought this to fit my Specialized Stumpjjumper FSR. The bar allows me to load it onto the Yakima Halfback 3. The ends (red in the picture) are rubberized and after a couple dozen trips have NOT scratched the bike. The bar telescopes, making it easy to get it on and off of the bike.
Perfect and easy solution to attaching my bike with a sloping top tube to my bike storage stands in the garage. This adapter is easy to hook and unhook, and built like a tank!