Does Burls offer 6AL4V seamless titanium tubing?
As far as I am aware the supply of such tubing is very rare. Reynolds do however supply seamless 6/4 but to order only and at a very high price. The cost of one of their titanium tubesets and frame components isn’t far off that of a complete Burls titanium frame. Several very well known and expensive brands build from seam welded 6/4 which is a sheet of titanium formed into various tube profiles and then welded. One of the problems associated with seamed 6/4 is that unlike seamless tubing where it is formed in such a way that the grain structure runs along the length of the tube and is uninterrupted, the seam weld can create a weakness in the tube thus potential for failure in extreme cases. It still seems to be generally accepted that 3/2.5 is the most suitable form of titanium for the main tubes and stays while 6/4 is used for the dropouts, headtube and bottom bracket shell. This is the specification for all Burls titanium framesets.
