Need help with seat post size

[LanceB]

@JimT

I was in the same boat so I made a special seat post that clamps over the original vintage frame post. My frame post is 1.000" (25.4 mm) OD without the paint. The pipe I used to make the seat post was about 0.098" ID so I had to bore it out just a little (about 0.003") to make it fit over the original frame post. Seems to work fine and should be a lot stronger then the original seat post and smaller seat clamp system.
Jim

You did an excellent job of fabricating that seatpost!