Originally Posted by
unterhausen
I don't doubt someone at one time made what he needs, but we don't know what unusual size post the bike takes. For example, 27.4 was a lot more available in the past. If I had to bet, that's what he needs. When I needed a 27.4 post, I was lucky the owner of my lbs had been hoarding a nice 27.4 DuraAce post. Shimming a 27.4 seat tube to something that you can get a set forward post in may not be so easy. You might just shim down to a size with no available posts.
I guess you could probably get someone to make a Ti post. But the shocking price might make a new frame look more reasonable.
A new
custom frame. There really isn't a lot going on with seat tube angles on production bikes.
But I would think that there is
some combination of shim and seat post diameter that could be made to work. It isn't like the stated shim conversion sizes need to be adhered to - the important thing is the shim wall thickness. And you could always sand the shim down by .2mm. Or simply make one from sheet stock.