I have referred a couple of people to Bernie Mikkelsen in Alameda, CA for steerer lengthening, which is done well above the crown to avoid heating paint or weakening the most highly stressed part of the steerer. I think the sleeving must be done in the straight-walled section for a snug fit. This obviously might not work with a very short steerer that needs to be lengthened only slightly, since the quill might be obstructed.
I would be really wary of riding on a welded seat post, unless a long, stout sleeve were in there. Without the sleeve, it would be hard enough to keep the post straight during welding, and the grain structure would most likely be severely compromised in a high-stress area.
David Snyder
Auburn, CA
USA
> No, I have never heard of a longer post.
>
> In this regard, in the past I wondered if it is possible to have a post,
> or the tube of a fork, safely lenghtened a bit.
> I have only heard skeptical comments about such projects.
>
> Has anyone out there thoughts, or better yet direct experience, in such
> matters?
>
> Sergio
> Pisa
> Italia