Finally: I tuned my seatpost from 162 to 113grams.

Discuss light weight issues concerning road bikes & parts.
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FelixOr
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Location: Vienna

by FelixOr

Hi,
I finally got the last parts I needed to finish the clamp for my EC90 ZeroOffset seatpost.
The post itself is a 260mm/31.6mm Easton EC90 Zero. With the original clamp it weighed 162grams, which was pretty nice, but every 5year old child could see that there's a lot of tuning potential in the clamp..... The thing was huge and ugly as well, so I had to do something.

The first thing I did, was filing off some material of the carbon halfpipe. It weighs 11grams now.
Second step was to order some aluminium beams from AX-Lightness, which I had to modify a little bit, because they didn't fit the Becker carbon-saddle.
3rd step: The bolts are titanium M6 ones, and weigh only 7grams :shock: .... I thought they were like 10-12gr.? I had to widen the "tunnels" of the post were you put the bolts through a little bit, because the original bolts were only M5.

complete weight: 113grams. So i lost 49grams with modifying the clamp :lol:

See all pictures here:
http://photoalbum.powershot.de/album.php?albumid=11687

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by Weenie


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FelixOr
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Joined: Wed May 04, 2005 8:05 pm
Location: Vienna

by FelixOr

more ...
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FelixOr
Posts: 1331
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Location: Vienna

by FelixOr

EDIT: sorry for double post! pressed "quote" instead of "edit"


one more....
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Boonen
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Location: Europe

by Boonen

Nice job Felix! I like it how you modified the post to use the AX beams, impressive weight together with that saddle :)

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tommy
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Location: belgium

by tommy

i am curious how it wil hold up... the stresses on the rails are much higher than the original clamp!

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Knut
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by Knut

Very nice job indeed Felix! Good thinking to replace the original clamp with new parts - it makes it even more impressive that this is one of the things that you can actually get away with doing even if you're "forced" to ride certain components due to sponsorship agreements. :thumbup:

@tommy: As I see it the design that Felix has achieved is much like M2, Extralite and New Ultimate, and I know of at least one rider using the NU seatpost with a Becker seat, on his hardtail MTB. I would not worry about durability.

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FelixOr
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Location: Vienna

by FelixOr

thanks Boonen&Madcow! :)

@tommy: Well, Knut said everything that's got to be said ;)

@Knut: :goodpost: :thumbup:

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col hicks
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Joined: Tue Mar 15, 2005 8:59 pm
Location: u.k

by col hicks

very cool felix ,tuning is the way to go :thumbup:

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DiterDV
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Joined: Thu Jan 26, 2006 11:38 pm
Location: Rome

by DiterDV

Nice job, I have the same Easton only in 27.2mm so maybe I'll look to cut some weight on that too!
There's no point in living if you can't feel alive - JB

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Ripley451
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Location: Leicester
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by Ripley451

Very nice Felix :)
Vorsprung Durch Tortë http://www.costablancacycling.com/

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sleepystarz
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Joined: Mon Feb 27, 2006 2:44 pm
Location: US

by sleepystarz

Saving 49grams on the clamp alone :shock: Really cool~!
96 Trek 2100
04 Principia RSL in the works

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Gold Knight
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Joined: Mon Nov 07, 2005 4:27 pm
Location: Santa Barbara, CA

by Gold Knight

Felix--great job. Did you know that AX will be selling the seatpost beams in CARBON in a few months (and they will come on their new SLS AX seatpost models as well)--thus you can even save 18g MORE!!!!!

Maybe you can share this w/Easton??
:smartass: DO NOT RIDE AN AX-LIGHTNESS FORK :smartass:

mzagorski
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by mzagorski

I "tuned" my 31.6 Thomson Masterpiece by cutting off 2" that weren't needed. That saved me 24g! Not bad.

by Weenie


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Ripley451
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by Ripley451

[quote="Gold Knight"]Felix--great job. Did you know that AX will be selling the seatpost beams in CARBON in a few months (and they will come on their new SLS AX seatpost models as well)--thus you can even save 18g MORE!!!!![quote]

Any more info on the SLS posts?
Vorsprung Durch Tortë http://www.costablancacycling.com/

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