EC90 Zero Easton’s lightest seatpost incorporates RAD™ Relief-Area Design andTaper- Wall™Technology for maximum weight savings and excellent durability. An all carbon post, including upper and lower clamping plates,The EC90 Zero has been intelligently designedTo distribute stress alongThe length ofThe post. Extra material in critical clamp zone prevents pinching ofThe carbon. Finish: UD Matte carbon Weight: 190gr (31.6) Quill Sizes: 27.2, 30.9, 31.6 Material: Easton EC9
Weaknesses: Maybe price, but the improvemet in ride quality outweighs that especially for 6-12 hours on the bike.
Bottom Line:
I just bought this post and installed it. I only have two rides on it to date, but the improvement in ride quality it provides compared to my Thomson is marked. It really smmoths out the small bumps and rocks and is the perfect addition to my Ti hardtail 29er. It should make endurance racing more comfortable this year.
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Submitted by
winsail
a Cross Country Rider
from Soquel, CA 95073
Date Reviewed: May 2, 2011
Strengths: Super light weight and strong. Dampens small bumps and saddle.
Nice adjustment markings for height.
Weaknesses: flat rear section allows mud into frame
Bottom Line:
I used this for 2 years as my primary post until I bought my height adjustable post. IT will be used again for any lightweight build I do. Hands down lightest best designed all carbon post. No it doesn't feel like a Thompson alu post. It shouldn't it's lightweight carbon
Bike Setup: current saddle TI rail devo WTB and Joplin 3 inch with remote seatpost
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Submitted by
OBE
a Cross Country Rider
from Overland Park, KS
Date Reviewed: February 26, 2011
Strengths: Light weight
Weaknesses: Weakness
Bottom Line:
After a number of years of hard riding, I've traded in my trusty aluminum bike for a sleek new carbon fiber model. I ordered a new Easton EC90 CF seat post to match. I was amazed when I read the instruction sheet. There was a whole page listing ways the seat post could fail including getting grease on it, scratching it, twisting it to insert into the seat tube. It stated that the product should be installed by a qualified bicycle mechanic using appropriate professional tools. It was recommended that the seat tube be sanded with fine grit sandpaper so the post doesn't get scratched. There were exact specifications as to the torque requirements for seat tube collar and saddle clamp bolts. So, does that mean that if I want to change the height of my saddle on the trail, I need to have a qualified mechanic with me who happens to have a recently calibrated torque wrench handy? Based upon the warnings it would seem I would be in constant danger of seat post failure, probably resulting in shards of high modulus carbon piercing my delicate regions.
Give me a break. I'll have to send this back to recover my dignity.
"You don't run through mud in ballet slippers."
Bike Setup: TURNER FLUX, FOX/PUSH, SRAM XO, MAVIC SL DISC
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Submitted by
wmike83
a Weekend Warrior
from Columbia, SC, USA
Date Reviewed: December 12, 2009
Strengths: Carbon, Flexes in a good way and Light
Weaknesses: patented clamp cutout is in the wrong spot and scratches easy
Bottom Line:
This is a great seatpost. The only thing you have to do is use a torque wrench and carbon grease. I went to my lbs and borrowed theirs for a few minutes in the shop to mount my saddle. The wrench is too expensive for purchase. This seatpost is awesome. The first day I rode it I could tell a difference from a metal one. It flexed in a good way and absorbed the harshness of the trail nicely. I recommend going with this post for anybody wanting to lower their overall weight and wants a more comfortable ride.
Bike Setup: 2007 specialized hardrock comp disc almost completely upgraded
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Submitted by
RYBO
a Cross Country Rider
from Calgary, AB, Canada
Date Reviewed: October 5, 2009
Strengths: Light
Weaknesses: See Below
Bottom Line:
Came with my Mojo in 2008, so my second season of riding. I maintained my bike very well. Last weekend went to remove the post from the frame and low and behold was unable to. Took it to the LBs and they removed it. Had to buy a new post ( got a Thomson) b/c the carbon seatpost had started to bubble and flake which caused it to get stuck in the frame. There was no grease on the seat post.
It seems the culprit is in the design, the diameter of the post is NOT round,the back of the post is squared off which results in an opening by the seatpost clamp on your bike which allows water in and air. As well, carbon and Aluminum do not mix, this causes corrosion of the carbon. ( the Mojo is a carbon frame with an aluminum insert for the seat post.) But if you read this thread you can see more people are having more issues with the Easton then others.
Submitted by
andrew
a Weekend Warrior
from miami,fl,usa
Date Reviewed: August 26, 2009
Strengths: Light weight, post offset suitable for cramped frames.
Weaknesses: Horrible clamping mechanisim. Poor design, constantly slips when torqued to specs. Grooves worn off first ride, save this post for the roadies!
Bottom Line:
Easton makes great parts. This seatpost is not one of them!
The clamping mechanisim is poorly thought out, and won't last. Who cares how light it is if it is constantly slipping. Don't waste your $, buy something that works! It can't take a 160 lb person on a softail in the flat trails of Miami!
Similar Products Used: Thomson, SDG I beam, Race Face
Bike Setup: Yeti as-r
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Submitted by
paneristi
a Weekend Warrior
from indonesia
Date Reviewed: March 14, 2009
Strengths: absorb vibration, seems very strong
Weaknesses: slippery, bolts hard to adjust (cramped)
Bottom Line:
comfortable compared to Thomson.
need to apply seatpost paste to prevent slip
To the reviewer with the Ibis Mojo: Is it made in China?
I know Ibis Mojo is (made in China)
Submitted by
Ruger
a Cross Country Rider
from Nor Cal
Date Reviewed: February 23, 2009
Strengths: Lightweight.
Weaknesses: Difficult to adjust saddle clamps. Difficult to torque because the nut is so close to the post, long extension helps. Not secure.Made in China!
Submitted by
lokiboy8
a Cross Country Rider
from Golden, CO
Date Reviewed: July 27, 2008
Strengths: Light, no off-set, dampens vibration, matches my shoes
Weaknesses: None
Bottom Line:
I have used Thompson posts for 8 years (over 10,000 miles -- 7,200 on my last one!) and decided to roll the dice, as it were, and go with this one. I have heard of some failures but after 700 miles and one horrific crash (broke the frame in 3 places) all is well.
I have not heard a single peep or squeek out of the post/saddle interface.
After using a Thompson, THE absolute bombproof post of all time -- I expect nothing less than perfection.
A couple caveats about this seatpost that may relate to those failures --
The seat tube edge must be TOTALLY smooth -- or else you will get scoring, which will weaken the post.
When pulling or inserting the post in the seat tube, you MUST NOT TWIST IT BACK AND FORTH -- or said same will occur.
Lastly, you MUST use a torque wrench when tightening the bolts on the saddle clamp. It's carbon -- duh!
I can't help but wonder about all this when people have a failure.
As my former boss and good friend Jim "Jimbo" Deines always says -- "A tool is only as good as the nut on the OTHER end of the handle." ;0)
As to the price, yes, I got this NEW for $120. I was so incredulous I made the poor guy go to the warehouse, bring it to the phone, pull it out, read to me what it said on the post, then, finally -- weigh it!
He was a very good sport, I must say -- I think he got a kick out of the whole affair.
I just could not BELIEVE it was going for almost 1/2 price!!
So, shop around, my friends...
Bike Setup: '07/08 Titus Racer X Carbon -- Fox, XTR, Raceface, Avid, Easton, King, Mavic, Kenda, Thompson, WTB, ODI, Salsa
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Submitted by
Scott
a Cross Country Rider
from Monterey, CA
Date Reviewed: May 8, 2008
Strengths: Light weight, strong, beautiful
Weaknesses: Spendy
Bottom Line:
Easton's excellent reputation for carbon bars is well represented in this seatpost. It's a great blend of strength and light weight. Clamp mechanism works as it should. Only complaint is that the rear side of the post itself has a flat face with markings to help with height adjustment. The problem is that water sprayed under the saddle from washing can run down the seatpost and into the frame in the small gap between the flat face and the seat clamp. I was surprised when water shot out of that gap when I turned my bike upside down after a couple of washes. Only 4 chilis for value because of high price. People will pay top dollar for the best though, won't they?
