Flexy Seatposts?

[Bici-Sonora]

I'm having my custom road/all road frame designed to have a lot of seatpost exposed for comfort. From what I've read, the Ergon and then the Ritchey have the most flex.

I need a post with some (at least 10mm) setback and preferably one that will take carbon seat rails. Those that have my attention:

• Ritchey WCS Flexlogic
  Roval Alpinist
  Ergon CF3 Pro

What am I missing?

[Waldo62]

The apparently no-longer-in-production Specialized CG-R is pretty comfy. It worked well for me until the single-screw clamp stopped holding and the saddle kept tipping forward or back, depending on which way I was leaning.

Cannondale makes posts in 25.4 diameter, supposedly for added flex. You can probably shim one into your seat tube.

[sevencyclist]

Lots of good review of Syntace HiFlex carbon post. Needs more than 10cm exposure to work great, but apparently very comfy. But might not have setback. Not sure if they do have one or if the clamp allow some shifting back.

https://www.syntace.com/en_GB/produc...di2-ready?c=86

[donevwil]

I once considered the Canyon S15 VCLS CF and while looking for the link saw the Niner RDO if just a skosh of travel would suit you.

[fa63]

Originally Posted by sevencyclist

Lots of good review of Syntace HiFlex carbon post. Needs more than 10cm exposure to work great, but apparently very comfy. But might not have setback. Not sure if they do have one or if the clamp allow some shifting back.



https://www.syntace.com/en_GB/produc...di2-ready?c=86

The clamp on the HiFlex allows plenty of adjustment if your saddle rails are long enough.

[mhespenheide]

If you really want to throw tradition to the wind, you could also check out the Cane Creek eeSilk.

And the Roval seatpost you're looking for is the "Terra", not the "Alpinist". The Alpinist is superlightweight, the Terra has 18mm of claimed travel.

[lavi]

Originally Posted by mhespenheide

And the Roval seatpost you're looking for is the "Terra", not the "Alpinist". The Alpinist is superlightweight, the Terra has 18mm of claimed travel.

I have the Alpinist on my Aethos. Great post and great looks. I have a **** ton of exposed post. I may be missing something, but I don't really feel my post flexing very much, if at all. Who know, maybe it is flexing and I just don't sense it.

[zzy]

+1 for the Syntace Hiflex

[Peter P.]

Kind of ironic that we want these super stiff carbon frames, then want flexy seatposts for comfort...

[Louis]

Originally Posted by Peter P.

Kind of ironic that we want these super stiff carbon frames, then want flexy seatposts for comfort...

Brooks B135

[robt57]

I know this ain't the ww forum, but 1639 gram saddle, just couldn't do it. That is a seat not a saddle pretty much...

Originally Posted by Louis

Brooks B135

[xeladragon]

If anyone's looking for a nearly new flexy seatpost at a discounted price...

[ultraman6970]

IME harmonics is the killer with flexy seatposts, they start bouncing weird and you lose stroke power IME, specially if you like to spin. With smashers probably wont be an issue but at the same time some stuff flex so much in carbon that the life span of the seatposts is not too long. Honestly u dont want a seatpost to snap suddenly.

[herb5998]

another vote for the P6 Carbon Hi-flex, very good clamp setup, and fairly effective damping.

[mhespenheide]

Originally Posted by ultraman6970

IME harmonics is the killer with flexy seatposts, they start bouncing weird and you lose stroke power IME, specially if you like to spin. With smashers probably wont be an issue but at the same time some stuff flex so much in carbon that the life span of the seatposts is not too long. Honestly u dont want a seatpost to snap suddenly.

Ultra, while I sympathize with that concern, do you have any evidence of "flexible" carbon seatposts snapping? I've been curious about them for a while now, and haven't run across any documented stories about a problem.