Flexy Seatposts?

[fa63]

Originally Posted by robt57

Not sure it is carbon rail friendly, excellent post IMO.



Also the CG-R need the carbon clamp bits, it come with round rail bit I believe...

Definitely carbon friendly, I use a Brooks Cambium C13 with carbon rails on it. This is also the comfiest seatpost / saddle combination I have ever used; the saddle alone made a difference but combined with the seatpost, they really take the sting out of the bumps on my gravel bike.

[John H.]

Specialized CGR has more setback than listed- More like 35mm than 25mm. Kind of a kludge on a custom bike. Very unattractive.
Specialized also makes the Terra. It is supposed to have flex for comfort.

Another possibility is a titanium post like an Eriksen Sweetpost with setback.

[wombatspeed]

Another vote for the RDO Niner.
I also have a Look seatpost that looks (ahem) very similar to the Niner and is very comfy.

Otherwise Ti:
Eriksen sweet post on my hard tail MTB
Use Alien ti. On my single speed. Most comfy of them all. Maybe too flexy if you are much above 150 pounds.


Sent from my iPhone using Tapatalk

[SlowPokePete]

Titanium and 27.2 gets my vote.

SPP

[fredd]

Way expensive, but Schmolke faired really well in one of the german magazine tests back in 2012, beating the Syntace P6 and the first generation of the Canyon flexpost by a good margin. You could say they... schmolked the competition
https://www.schmolke-carbon.com/wp-c...t_seatpost.pdf

Also in a test by Velo Magazine, the Moots posts didn't do very well, in fact they were behind the thomson masterpiece, which makes me rethink ti.
https://www.cyclingabout.com/seatpos...cling-comfort/

[yinzerniner]

Specialized CGR is heavy, expensive and ugly for marginal comfort gains.

Other than a suspension post like a eesilk or redshift the Canyon VCLS / Ergon CF3 provides the greatest amount of give , but you need a decent amount of seatpost showing.

Otherwise if you can’t do a flexy setback post like those already mentioned (niner,
Ritchey, etc) it might be best to find a 25.4 post and use a shim.

[sparky33]

Originally Posted by fredd

You could say they... schmolked the competition
https://www.schmolke-carbon.com/wp-c...t_seatpost.pdf

That cover photo had me wondering what the seatpost test was actually testing!!! Wish I could translate it.

Looking at the Schmolke website for the first time...are all their posts custom for purpose and rider weight? They don't clarify which are the flexy or stiff posts. How does one distinguish the offerings other than by weight/price?

[fredd]

Originally Posted by sparky33

That cover photo had me wondering what the seatpost test was actually testing!!! Wish I could translate it.

Yeah, the cover photo is regrettable... For the test, from what I understad, they pulled the seatposts perpendicular to their lengths with 175mm showing, using a set amount of force, and measures how many newtons it took per milimiter of flex, which is kind of a weird unit. Flex/force would be more intuitive

[sparky33]

Originally Posted by fredd

they pulled the seatposts perpendicular to their lengths

I wonder why perpendicular? A more realistic test would position the post at a typical seattube angle relative to the force.

[tuscanyswe]

Originally Posted by sparky33

I wonder why perpendicular? A more realistic test would position the post at a typical seattube angle relative to the force.

Yes very weird unless ppl with more knowledge than me know that results would be the same anyways.

[roguedog]

Anyone tried a Parlee seatpost? Impressions? Might be a good choice. We know they know carbon.

[robt57]

One frame I have had a butt in the seat tube that the 27.2 post just hits, 4" down. Once the post slipped and the bottom jamed in the butt. Stress on a thinwall tube that would better not exist.

Instead of cutting carbon posts, I did the Cannondale 25.4 with a shim and the skipped the thought of reaming to make the 27.2 fit and make the section below the butt even thinner wall tubing.

In my case I went with a C2 as the compact frame has quite a bit of post showing. It is plenty stiff and I am 200 lb. But the P6 has a better feel I'd have to say, but the more showing the better for good flex.

BTW, I have an old alloy WCS that like the P6 and the Tomsons is round OD but ID is thinner front and back for flex. That Alloy WSC flexes more than the C2 showing less post.

So even a Tompson showing a good amount flexs nice enough to notice.

FWIW the CG-R is good too, but it does rock [top] more than post flex for/aft. Food for those who may not like the for/aft movement sensation.

[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.