Bridgestone did this on a cheap steel bike ca. 1980,
and I believe Vitus or TVT had a clampless frame with
an expanding seatpost around 1985.
David Feldman
Vancouver, WA
> My modern (1998 TREK 2300) superbike just split its
> aluminum seat lug
> at the base of one of the lug ears, and the frameset
> is ruined. I
> have held a funeral and am sending it to that great
> crematorium in
> wisconsin for recincarnation as a completely
> different frameset from
> the bike gods at TREK.
>
> This got me thinking about internal expander
> seatposts. Jan Heine
> tells me that expander seatposts are an "Alex
> Singer" exclusive
> feature. Is this really true ?? Did any other
> maker ever sell
> expander seatposts ?? By this I mean a seatpost
> that operates upon
> the same principles as a quill stem.
>
> Alas, my bike was 3 tubes carbon and so an expander
> would probably
> split open the carbon tubes and would therefore not
> solve my problem.
>
> - Don Gillies
> San Diego, CA
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