Originally Posted by
Live Wire
Where can you buy them?
henry james. they are listed under aero tubing. there are two versions. one is round at the bottom and the other is ovalized. they are a bit tougher to use than a regular tube but it doesn't take too much figuring to get it right. One thing to watch out for is that it stays aero pretty high up, so when building a small frame you usually have to extend the ST so that there is enough room for a seatpost before it gets aero.