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PostPosted: Mon Jul 11, 2011 1:28 am 
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Joined: Fri Jul 23, 2010 2:56 am
Posts: 119
I found an awesome deal on a carbon seatpost but its 400mm long and I only need it to be about 230 to 240mm. Can I safely cut it down to that length. Its already alot lighter than my current at 400mm but this is weight weenies. I need a quick answer.


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Posted: Mon Jul 11, 2011 1:28 am 


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PostPosted: Mon Jul 11, 2011 1:50 am 
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Joined: Fri May 13, 2011 4:04 am
Posts: 268
Location: Los Angeles | Boulder
I've done it ... no problem. I know some I've heard it's not adviseable (edge/enve? - can't remember)

Just remember to measure the minimum insertion amount and cut down from the seatpost collar mark leaving that much room. I saved about 15g off a 270mm post...

good luck, it seems intimidating, but it's not that bad once you get into it.

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PostPosted: Mon Jul 11, 2011 1:52 am 
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Joined: Sat Nov 20, 2010 6:06 am
Posts: 969
Location: Perth, Western Australia
Check minimum length marking, make sure when you cut that you leave same minimum in frame.
Best to use a carbon specific blade, or get your LBS to cut it for you.
Seems like most WW's cut seatposts to reduce unnecessary weight.
I went from 197 to 160g on my Enve seatpost saving 37g

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PostPosted: Mon Jul 11, 2011 1:55 am 
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Joined: Fri Jul 23, 2010 2:56 am
Posts: 119
Thanks guys as I should be able to cut 160 to 170 mm off and that should save me some serious weight.


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PostPosted: Mon Jul 11, 2011 2:48 am 
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Joined: Wed Dec 20, 2006 1:42 am
Posts: 64
Location: NYC
Be careful to not inhale the dust.


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PostPosted: Mon Jul 11, 2011 3:05 am 
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Joined: Fri Jul 17, 2009 4:10 am
Posts: 1146
The seatpost needs to extend past the bottom of the toptube. Other than that, you'll be fine.

Either use a carbon fiber cutting blade or a new 32tpi blade. You can also wrap the post in masking tape to avoid splintering


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PostPosted: Mon Jul 11, 2011 3:21 am 
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Joined: Fri Jul 23, 2010 2:56 am
Posts: 119
I going to get my LBS to do it. I just wanted to make sure it was safe


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PostPosted: Mon Jul 11, 2011 4:38 pm 
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Joined: Wed May 24, 2006 6:25 pm
Posts: 1402
Some cf seatposts have a clamping area. If you cut off the clamping area, you can't safely clamp it anymore. :roll: :smartass:

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PostPosted: Tue Jul 12, 2011 2:58 pm 
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Joined: Wed Apr 13, 2011 9:51 pm
Posts: 62
I cut my Ritchey Superlogic down without any problems. Definitely use masking tape and be careful of the dust. I used a hacksaw with a fine tooth blade - no splintering at all.


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PostPosted: Tue Jul 12, 2011 3:07 pm 
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Joined: Wed Dec 22, 2010 5:49 pm
Posts: 63
Location: San Diego, CA
I had to cut my girlfriends post on her carbon synapse to get the seat height low enough. I used a light cut-off wheel on a dremel and followed a guide line of some tape that i used to keep it even. It cut through it like butter. I wouldn't hesitate to cut another seatpost. Do the math on the minimum amount and wear a mask - i wish i would have, the dust gets everywhere and can't be good for you.


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Posted: Tue Jul 12, 2011 3:07 pm 


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PostPosted: Tue Jul 12, 2011 4:14 pm 
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Joined: Mon May 15, 2006 12:19 am
Posts: 590
Location: Vancouver, BC, Canada.
You could also use one of those saw guides intended for fork steerer cutting to get a clean line.


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