enlarge seatpost cradle for thicker rails

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PoorCyclist
Posts: 783
Joined: Wed Dec 07, 2011 1:26 am
Location: California's country side

by PoorCyclist

I'm trying to fit my tune speed needle to deda seatpost (was told and seen from old post that it is supposed to fit) Well, almost. Do you have suggestion of tool or filler to use for better fit?
Attachments
saddle.JPG

by Weenie


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Marin
Posts: 4035
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Dremel or file.

Marin
Posts: 4035
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Or, wrap sandpaper around the rails and use them as a tool.

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kman
Posts: 1117
Joined: Wed Jul 13, 2005 10:51 am
Location: Sydney, Australia

by kman

I used a Dremel on an old corima post for my speedneedle.
You can't be a real country unless you have a beer and an airline. It helps if you have some kind of a football team, or some nuclear weapons, but at the very least you need a beer.
-- Frank Zappa

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jekyll man
Posts: 1570
Joined: Wed Apr 25, 2007 10:23 am
Location: Pack filler

by jekyll man

Can't you get a cradle for oversize rails?
Official cafe stop tester

PoorCyclist
Posts: 783
Joined: Wed Dec 07, 2011 1:26 am
Location: California's country side

by PoorCyclist

so after evaluating all the tool options including dremel or drill bits applied sideways.
I decide to simple use a file, if I take a flat file and go at an angle on the 2 edges of the each groove, the saddle rail should sit into place eventually?

I measured 7.6mm width of these rails and the seatpost is spec'd for 7mm round, so it might not need that much work at all.

eric
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Location: Santa Cruz, California, USA
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by eric

use a round file. Corners are stress risers.

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kman
Posts: 1117
Joined: Wed Jul 13, 2005 10:51 am
Location: Sydney, Australia

by kman

Yep. Round file.
You can't be a real country unless you have a beer and an airline. It helps if you have some kind of a football team, or some nuclear weapons, but at the very least you need a beer.
-- Frank Zappa

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kbbpll
Posts: 494
Joined: Wed Oct 20, 2010 5:56 am

by kbbpll

It looks like the right side is well-seated so I don't understand why the left isn't. Maybe it's the picture.

PoorCyclist
Posts: 783
Joined: Wed Dec 07, 2011 1:26 am
Location: California's country side

by PoorCyclist

both sides have the gap, the rail isn't perfect either, I flipped around and the fit looks different.
I started filing it and removed quite a bit of material on the inside, I have to be careful on the outside to leave enough material so the saddle will not fall off the edge. It was then obvious to me the groove is now simply going to look like it is hand made, so that is going to have to be good enough.

Honestly I don't think I'm making things that much better and having thoughts of ruined a new expensive seatpost. The thing is that there will be an air on the bottom of the rail, so I am going to add epoxy and mold the rail on so there is something solid to sit on.

PoorCyclist
Posts: 783
Joined: Wed Dec 07, 2011 1:26 am
Location: California's country side

by PoorCyclist

OK, finished. After I used epoxy to mold the rail, it worked great and saddle rail is getting supported at the bottom instead of getting pinched.

see pictures for descriptions
Attachments
DSC_5002.JPG
DSC_5005.jpg
DSC_5009.JPG

by Weenie


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