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PostPosted: Sun Jul 01, 2007 12:13 am 
Retro Guru
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Joined: Wed Jan 24, 2007 6:27 pm
Posts: 356
Location: NevereverLand
Hi All

I've finally found a 27.8mm seatpost to rebuild my bike but I still find it
a tad bit too small, it slides down easily when completely loosened and in order for me to secure it (Shown in picture) I have to tighten the bolt until it kinda bends slightly, since both the bolt and frame made of titanium will there be any harm done to either one?

Please advise,
Thanks


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PostPosted: Sun Jul 01, 2007 3:38 pm 
Old School Grand Master
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Joined: Sat May 20, 2006 2:56 pm
Posts: 4776
Location: No brakes? Way to commit soldier.
Any bolt that is bent runs a higher risk of failiure and if your post is a tad too small for the frame, you may be ovalising your seattube by clamping it up tight enough to hold the post.

Is it possible that you need a 28.0mm dia post?

I would consider buying a 27.2 dia post and shimming it up to 28. USE make a 27.2-28.0 shim it only weighs 7g. You'd also have a much wider choice of posts.

USE shims here...

http://www.totalcycling.com/index.php/p ... _shim.html


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PostPosted: Sun Jul 01, 2007 4:05 pm 
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Joined: Fri Sep 22, 2006 1:12 am
Posts: 2461
Location: Hobart, Tasmania, Australia
One thing I find which works a treat on posts which are slightly on the small size is wrapping a bit of packing tape around the post (on an angle)before you put it in the frame. It takes a bit of fiddling to get the right amount (make it just tight enough that you have to really lean on it to get it in), but when you get it right all the slipping problems disappear without having to use excessive bolt tightening.

I first used this trick in an enduro race in early 2003 when I had a problem with a shim and nothing else in the toolbox and it worked so well I've been using the tape without the shim on that frame ever since with zero problems.

Give it a go as you won't find a cheaper solution. ;)


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PostPosted: Mon Jul 02, 2007 9:41 am 
BoTM Winner
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Joined: Thu Jan 19, 2006 1:23 pm
Posts: 2760
Location: NW England
I'd be cautious, a welded on seatbolt mount snapped off my Ti frame.


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PostPosted: Mon Jul 02, 2007 11:12 am 
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Joined: Tue Jan 30, 2007 9:53 am
Posts: 405
Location: Munich, Germany
Hello, just take a coca cola can, remove top and bottom, cut it through upright and wrap it around the seatpost! That should solve your problem!

Cheers,
Chris


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PostPosted: Mon Jul 02, 2007 12:35 pm 
Karma Queen / Cake Meisterin
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Joined: Thu Jul 27, 2006 10:02 pm
Posts: 6736
Location: North Yorkshire
posh26 wrote:
Hello, just take a coca cola can, remove top and bottom, cut it through upright and wrap it around the seatpost! That should solve your problem!

Cheers,
Chris


Please make sure you have the emergency sevices on standby before attemting this method. :) I'm just imagining what would happen to me :roll:


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