I'm currently building up my fixie for the up-comming Fixie Century.
I found a cool tool at work which measures seat-post diameter, but mine measured in at 24.5!!!
I've checked on all of our suppliers lists, and the closet I've seen is a 25.4
Any ideas? Hidden stashes of crazy skinny seat-posts?
Crazy seat-post diameter
-
- Posts: 1010
- Joined: 09 Sep 2008, 01:43
- Location: Marrickville
Chances are that the seat tube is 25.5 when the clamp is undone and 25.4 once its done up. Its suprising but as little as 0.2 of a mm is the difference between something sliding or being fixed. Id say test a normal 1 inch seat post in it and it should be fine.
Colnago made a bike around 1982-1983 called the Oval CX which used a 20mm seatpost, so you can go thinner. I believe some Peugots, British folding bikes and BMX bikes used the 24.5mm size too though.
The obvious question to ask is what's wrong with just using the seatpost you measured?
Did you use one of these...?
or maybe you used one of these...?
in which case you are actually measuring the frame not the post. It is possible to ream the frame out to say 25.4mm to fit a more conventional post.
I know that Thompson have made posts in 24.5mm in the past, but I think your best bet would be to ask the Guru on such matters (Peter Bundy) and if that fails, ring around a few BMX specialty bike shops. (I think there is one in King Street Newtown).
The obvious question to ask is what's wrong with just using the seatpost you measured?
Did you use one of these...?
or maybe you used one of these...?
in which case you are actually measuring the frame not the post. It is possible to ream the frame out to say 25.4mm to fit a more conventional post.
I know that Thompson have made posts in 24.5mm in the past, but I think your best bet would be to ask the Guru on such matters (Peter Bundy) and if that fails, ring around a few BMX specialty bike shops. (I think there is one in King Street Newtown).
Oooo, thanks for all your help! I now have lots of ideas.
Toff, the tool I used was the first one. If you see the top half of it, you stick it "inside" the space where the seat-post goes. Sad but true, there is no seat-post currently on the bike, but the bmx idea will be worth looking into.
Cheers!!!
Toff, the tool I used was the first one. If you see the top half of it, you stick it "inside" the space where the seat-post goes. Sad but true, there is no seat-post currently on the bike, but the bmx idea will be worth looking into.
Cheers!!!
Who is online
Users browsing this forum: No registered users and 1 guest