On 8/17/06, kerrigan bennett <krbennett@earthlink.net> wrote:
>
> Seems like the wall thickness that naturally corresponds to a 26.8 seat
> post would be 0.8 mm. So, if the 26.8 is not the result of sleaving or
> excessive reaming of a smaller diameter, then the frame is built with a
> straight guage 0.8 seat tube, like Columbus Gara (not sure what earlier
> versions might have been called) or perhaps with a double butted seat tube
> that was 0.8 at the top (I think this was done in some japanese tubing
> bikes in the 80's).
>
> Or maybe there was a single butted seat tube around that was 0.8 or
> smaller at the top. I'm far from expert, but the heaviest I've heard about
> was 0.7/1.0, Columbus SP (and later, Thron). My 80's Team Miyata took a
> 26.8 seat post and proudly boasted of proprietary triple butted tubing,
> although I don't know details of the seat tube butting.
For whatever it's worth, my Reynolds 708 Hollands (with the rifling on the tubes) takes a 26.8 as well.
sasha "this is my rifle this is my seat tube" eysymontt, nyc.
---
,+'^'+ sasha eysymontt
sashae at gmail dot com - http://subtle.org/
`+,.,+` new york city.