cadenceblur Posted November 10, 2011 Posted November 10, 2011 hi besides weight reduction , will a carbon fibre drastically improve one's ride from a comfort point of view due to its shock absorbing properties ?
Soggy Posted November 10, 2011 Posted November 10, 2011 hi besides weight reduction , will a carbon fibre drastically improve one's ride from a comfort point of view due to its shock absorbing properties ? Shock absorbtion? First time I hear that. I know they are lighter than Alu ones, but didnt hear of shock absorbtion properties on a carbon seatpost
CAAD4 Posted November 10, 2011 Posted November 10, 2011 They are not all lighter than aluminium. Some of the Ritchey and Thomson alu seat posts are quite light.
Soggy Posted November 10, 2011 Posted November 10, 2011 They are not all lighter than aluminium. Some of the Ritchey and Thomson alu seat posts are quite light. Ok cool, then its all just marketing
b-unit Posted November 10, 2011 Posted November 10, 2011 I've also heard that it is more comfy. Would like to hear from someone who had both on the same bike.
SCHWINN LOVER Posted November 10, 2011 Posted November 10, 2011 Aluminium should bend before snapping,carbon is just going to snap leaving your ass to be raped by a very sharp piece of carbon fibre but well the choice is yours??
Zac.A Posted November 10, 2011 Posted November 10, 2011 Cannondale Save seatpost is amazing if you can get hold of one, very expensive and limited though...
mark ellis Posted November 10, 2011 Posted November 10, 2011 ridden both alu and carbon, cant say I ever felt more comfy on carbon. can make a big weight difference though
Goodbadugly Posted November 10, 2011 Posted November 10, 2011 Aluminium should bend before snapping,carbon is just going to snap leaving your ass to be raped by a very sharp piece of carbon fibre but well the choice is yours??Not really. The limbs of compound bows are made of CF and they bend a lot.A pipe structure like a seatpost show very little flex, unless you modify the pipe like those Cannondale seatposts.An alu KCNC post weighs around 150 grams. An EC 70 around 220 grams. Thomson Elite around 300 grams. Expect the lighter alu posts to be more fragile. Stay away from single bolt designs.Your credit card will feel the biggest difference.
b-unit Posted November 10, 2011 Posted November 10, 2011 http://www.ninerbikes.com/seatpostsMarketing BS...? Who's going to find out for us?
JGdp Posted November 10, 2011 Posted November 10, 2011 http://www.ninerbikes.com/seatpostsMarketing BS...? Who's going to find out for us?How easy do the seatposts break?? when you ride them on their limit with regards to length inside the frame??
TNT1 Posted November 10, 2011 Posted November 10, 2011 (edited) How easy do the seatposts break?? when you ride them on their limit with regards to length inside the frame?? Dunno. I've only seen ally one at the insertion limit , and they tend to wreck the frame... Edited November 10, 2011 by TNT1
b-unit Posted November 10, 2011 Posted November 10, 2011 1320955675[/url]' post='1529106']How easy do the seatposts break?? when you ride them on their limit with regards to length inside the frame?? Dunno, order one and let us know.
Christie Posted November 10, 2011 Posted November 10, 2011 Seat + seat rails flex much much more than the seat post. I think the impact of the material of the post on shock absorption tends to ZERO. BUT For a carbon frame, I would recommend a carbon post over aluminium. Carbon vs aluminium = good galvanic potential, if some sweat or salt water get in there, it will cause corrosion / have them seize together.Same could happen to a carbon post in an alu frame. As far as strength goes, if you stick to big companies like 3T, Easton, FSA, you won't have a problem. I'm not sure if a "stupid light" seatpost (or handle bar, for that matter) is clever on SA roads. JXV 1
Dubber88 Posted November 10, 2011 Posted November 10, 2011 (edited) Seat + seat rails flex much much more than the seat post. I think the impact of the material of the post on shock absorption tends to ZERO. BUT For a carbon frame, I would recommend a carbon post over aluminium. Carbon vs aluminium = good galvanic potential, if some sweat or salt water get in there, it will cause corrosion / have them seize together.Same could happen to a carbon post in an alu frame. As far as strength goes, if you stick to big companies like 3T, Easton, FSA, you won't have a problem. I'm not sure if a "stupid light" seatpost (or handle bar, for that matter) is clever on SA roads. +1. Your seat and the way it bends has a lot more to do with impact absorption on that section of the bike. I must also admit I have ridden both and changed the alu seat post on my Niner to a Ritchey WCS Carbon seat post with 25mm setback. From what I can feel it makes a little bit of a difference, but seriously not the price worth when looking at a comfort upgrade. Regarding the weight difference, carbon usually isn't a weight upgrade, but has more to do with the benefits of the properties of the material(s). Like for instance carbon handle bars goes a long way to reduce impacts that you can actually feel. Edited November 10, 2011 by Dubber88
nickc Posted November 11, 2011 Posted November 11, 2011 Cannondale Save seatpost is amazing if you can get hold of one, very expensive and limited though... Agree with Zac - with the Cannondale SAVE seatpost it has an engineered bend in it which provides about 40 mm shock absorber movement which takes the edge of the bad stuff especially if you ride a hardtail. As Carbon does not fatigue like a metal it works well.I agree if it has no play built into it it probally will be more marketing hype but the Cannondale seatpost works.The down side is price but Omnico SA have got stock in again.
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