Is this seatpost un-safe?

Discuss light weight issues concerning road bikes & parts.
mattyb95
Posts: 128
Joined: Fri Aug 10, 2012 11:54 am

by mattyb95

I have noticed a scoring in my FSA K-Force seatpost. It has come from the seat-clamp, the slot of which sits at an angle against the seatpost rather than at 90 degrees so I think I have over-tightened and in doing so the seat-tube has cut in to the post. From the photos, can anybody advise if the seatpost is at risk of failure, the gouge can be felt with a fingernail but I can't tell if its purely cosmetic or has possibly compromised the carbon? (The last photo just shows the condition of the lower part of the post in case that writes it off too)

Thanks.

Image
FSA 01 by matthew.brett, on Flickr

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FSA 02 by matthew.brett, on Flickr

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FSA 03 by matthew.brett, on Flickr

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FSA 04 by matthew.brett, on Flickr

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FSA 05 by matthew.brett, on Flickr

by Weenie


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MajorMantra
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Joined: Mon Nov 02, 2009 8:38 pm

by MajorMantra

Difficult to be certain from a photo (and disclaimer blah blah blah) but that doesn't look like a problem to me. If it were mine, I'd ride it.

artray
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Joined: Fri Oct 07, 2011 2:08 pm

by artray

You should not use that. Carbon has been compromised it can just snap and it has happened to me .
I know it does not look like much but carbon can be deceptive and it's just not worth the risk.

mattyb95
Posts: 128
Joined: Fri Aug 10, 2012 11:54 am

by mattyb95

That was my concern, have been using an old one instead for the meanwhile and as I was taking photos for something on eBay, thought I'd take photos and ask the question here whilst I was at it.

em3
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Location: NYC

by em3

artray wrote:You should not use that. Carbon has been compromised it can just snap and it has happened to me .
I know it does not look like much but carbon can be deceptive and it's just not worth the risk.



I completely DISAGREE....looks like a lot of clear coat scraping/scoring but no evidence that the carbon has been compromised. You will usually see clouding in the epoxy when damage has compromised the carbon fiber layers.

Ride it.

EM3
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KristjanS
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Joined: Sun Nov 16, 2008 6:41 pm
Location: Estonia

by KristjanS

Last year I broke FSA K-Force seatpost that had the sema damages, on mtb race. Before that, I used the post for years on training. So, 50/50. I would not reccommend.

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drhule23
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Location: Delaware, OH

by drhule23

It's difficult to answer b/c obviously no one wants to see you suffer a failure and get injured.
But I agree that it looks like superficial damage.
If it were mine, I would continue to ride it, assuming this is on a road bike and you don't ride on a lot of rough roads.
If this is on an MTB, well, I would be a bit worried.

Unfortunately, there is no clear concensus among the experts here, so ultimately you'll have to decide for yourself what level of risk you're willing to take.
Last edited by drhule23 on Mon Dec 10, 2012 2:13 pm, edited 1 time in total.
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mellowJohnny
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by mellowJohnny

Here's how I'd look at it:

a few seasons of use + possible structural damage = good excuse to get yourself a new, lighter one.

I personally would not risk it, but I'm gettin' old... :-)

1415chris
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Location: Surrey UK

by 1415chris

You could sand this section of clear coat down to see, whether it's paint only or CF as well. That will take you just few minutes, literally. If it's the first option, you can re-spray it or even better strip the whole post down. If the second, get the new one.

NiFTY
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Joined: Sat May 26, 2012 11:26 pm

by NiFTY

I agree that it is a good reason to buy a new lighter post, but i would continue to use that. I kind it just looks like clearcoat damage, but no one can tell you for certain there is no underlying carbon damage. I had a crack in my top tube and kept riding it for 3 months - just kept an eye on it for expansion, whilst i dragged my feet going to my LBS and getting a warranty replacement. It was fine.
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SWijland
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by SWijland

As far as I can tell it looks fine. Cracked carbon tends to look a bit different from what is showing in the pictures.

mattyb95
Posts: 128
Joined: Fri Aug 10, 2012 11:54 am

by mattyb95

Ideally I'd rather not buy a new one or at least not a new fancy one as this is on my winter/commuter bike as it is too big for my Canyon.

Thanks for all the responses so far.

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Rick
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by Rick

No problems, IMO.
I've ridden far worse.

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ms6073
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by ms6073

I see a slight depression in the outer, cosmetic layer of the post but nothing that would prevent me from using it on my road or cross bike.
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edesigner
Posts: 113
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by edesigner

ms6073 wrote:I see a slight depression in the outer, cosmetic layer of the post but nothing that would prevent me from using it on my road or cross bike.


:shock:

God no.. if there was anything like that on my cross bike it would be pitched in a heartbeat. Road on the other hand doesn't have that risk of a snap. If a seatpost snapped on a remount it could cut your femoral artery and you could be dead in minutes.

NFW would I risk that. Road on the other hand..I imagine if it is more than cosmetic you would feel it gradually getting worse. That said.. anything that inexpensive I would just replace right away.

by Weenie


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