Seat Post problem on vintage Bridgestone road bike!!
elifreedman
Posts: 2
Greetings all,
Yesterday I purchased an old bridgestone road bike frame, hoping to convert it into a comfortable single-speed for city riding.
Upon examining it, it looked like the seat post was adjustable with a simple bolt--
unfortunately, when I loosened the bolt, you can see that it has nothing to do with holding the seat post in place (if you cannot tell by the picture, trust me on this one!)
At the point of contact between the seat post and seat tube, there is nothing attaching the seat post-- it looks almost like an extension of the seat tube.
The other end of the seat tube looks like this some kind of hexagon thread less than 1":
The bicycle itself is an old bridgestone
with a odd kind of stem quill that says "win japan 22.2" 
that A. confirms the bike was made in Tokyo and B. looks like the exact same kind of part as 
what is described as the missing part in a related post viewtopic.php?p=14985036 .
I am not sure how to proceed-- I figure that I have several options:
1. there is somehow a way of attaching a saddle to the top of my seat post (which may be too high but at least I have a complete bike)
2. I can redo the fork/headset and use the weird part from the front as my seat post and replace the fork or
3. cry
Thanks in advance for any advice!
Yesterday I purchased an old bridgestone road bike frame, hoping to convert it into a comfortable single-speed for city riding.
Upon examining it, it looked like the seat post was adjustable with a simple bolt--
unfortunately, when I loosened the bolt, you can see that it has nothing to do with holding the seat post in place (if you cannot tell by the picture, trust me on this one!)At the point of contact between the seat post and seat tube, there is nothing attaching the seat post-- it looks almost like an extension of the seat tube.
The other end of the seat tube looks like this some kind of hexagon thread less than 1":
The bicycle itself is an old bridgestone
with a odd kind of stem quill that says "win japan 22.2" that A. confirms the bike was made in Tokyo and B. looks like the exact same kind of part as what is described as the missing part in a related post viewtopic.php?p=14985036 .I am not sure how to proceed-- I figure that I have several options:
1. there is somehow a way of attaching a saddle to the top of my seat post (which may be too high but at least I have a complete bike)
2. I can redo the fork/headset and use the weird part from the front as my seat post and replace the fork or
3. cry
Thanks in advance for any advice!
0
Comments
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old-style saddle clamp should fit, there are different makes/types, for instance...
http://www.sjscycles.co.uk/brooks-chrom ... ch-(222-mm)-for-single-rail-byb101-prod25446
how about...
perhaps the post once had a simple band clamp that sat immediately above the top of the seat tube? over time the post rusted into place and one day the clamp fell off, as the post didn't slip the clamp was not replacedmy bike - faster than god's and twice as shiny0 -
You could make a new quill seat post, as you seem to have plenty of seat post to work with, like this...
http://www.retrobike.co.uk/forum/viewtopic.php?t=161071
You can buy adapters for your quill stem to change the top diameter.
You could join retrobike forum, there are others there with Bridgestone bikes, but try not to tell them you are making a single speed out of it
my isetta is a 300cc bike0 -
viewtopic.php?t=12929596&p=18402506
'nother Bridgestone with discussion / pics of quill seatpost
Incl photos showing that said bolt is to mount the cable stop for the rear centre pull brake, and as you say, nothing to do with clamping the seatpost0
