carbon seat post [Archive]

jfmckenna

10-27-04, 08:04 AM

At a cx race last Sunday I saw two carbon seat posts break!!!
One was an A racer who broke it with in the first 10 minutes and was standing up for the rest of the race. I think I will stick to AL or TI for seat posts. Anyone else?

Phiber

10-27-04, 01:06 PM

I just don't see how a properly designed carbon fiber seatpost could just break. What brands?

jfmckenna

10-27-04, 01:50 PM

I just don't see how a properly designed carbon fiber seatpost could just break. What brands?

I don't know what brands but believe me it happened. I was just guessing that with all the bouncing around and mounting/dismounting that the carbon was too brittle? You could see the pointed edges of the post like it was a brittle fracture if you know what I mean.

KleinRider

10-27-04, 02:29 PM

Could be the edge on the seat tube concentrated too much force for the carbon to handle? Which way did they break? (like backwards, front, or sideways)

oldskoolboarder

10-27-04, 02:32 PM

I've seen it where the bike is bouncing on the remount and the rider hit the seat on the back end of it. SNAP! No more seatpost...

flythebike

10-28-04, 07:10 AM

Definitely stick to Ti for a X seatpost. Fairly light, extremely strong. Damps some vibration. If you're a weight weenie USE makes one that is approximately 155 grams. I go with the Dean post myself. They are made in the USA and they stand by their products for life.

jfmckenna

11-02-04, 02:14 PM

Just a follow up. The story: http://www.fastcoaching.com/ first paragraph says it all.

Phiber

11-05-04, 01:56 PM

Just a follow up. The story: http://www.fastcoaching.com/ first paragraph says it all.

What?

jfmckenna

11-09-04, 06:35 AM

What?
Oh sorry about that

That site uses frames though it does not look like it. This is the page out side of the frames page:

http://linedrivepro.com/fast/fast2/new2/cross0401.html