daviedeth@hellokitty.com wrote:
> i'm looking for a seatpost binder bolt for my 1983 trek 500. i was
> not able to find a picture of one to help clarify which binder bolt
> it is, but i'm guessing there are some folks on here who know alot
> about vintage treks and maybe someone has a stash of these? it is not
> the conventional campy type binder bolt, the "nut" or left side does
> not have the tooth/no turn tab either, but possibly has another hex
> end to keep the bolt from turning when tightening. below are links to
> pics of seatpost clamp/seatlug from both sides, the left side where
> the bolt would come out or is not threaded. right now i'm using a 6mm
> hex head bolt with washer and nut on the other side, it is
> functional, but does not look good, or "correct"!please contact me
> offlist if anyone has one,much appreciated,
> http://www.flickr.com/
> http://www.flickr.com/
> david coxportland oregon
The binder on those models was a threaded (6M x1) barrel brazed onto the back of the seat lug. The barrel was counter bored to accept a standard 6M x 1 Allen head bolt (stainless). Since the barrel itself was threaded there was no need for a two-piece (keyed or knurled) binder bolt -- just the simple Allen bolt threaded into the barrel was sufficient.
Is the barrel on your Trek perhaps stripped, such that the standard Allen bolt no longer holds?
--
John Thompson (john@os2.dhs.org)
Appleton WI USA