Easton EC70 Carbon Seatpost

Available At:
EC70 Carbon

Thanks to genetic differences, we'll never all ride the same equipment. Luckily, companies like Easton make different seatposts that reflect our particular sizing needs. If you find yourself in the camp that prefers a setback post, the Easton EC70 Seatpost may just be the winning ticket. It features proven aluminum/carbon composite construction and weighs as little as other seatposts costing twice as much.The EC70 uses a two bolt design for the seat rail clamp. We've found this to be generally superior to single bolt clamps in terms of minute adjustments in saddle tilt. There are no splines, teeth, or otherwise to dictate exactly where you can position your saddle. The design relies on two simple bolts to apply even torque to both ends of the clamp and each is adjusted independently of the other to secure the unit. The forged alloy clamp assembly is bonded to the seatpost shaft, which is made of their CNT carbon fiber and uses Easton's Taperwall and RAD (relief area design) technology to minimize the material while preserving the strength necessary for a durable post worthy of their 5 year warranty.The Easton EC70 Seatpost has 10mm of clamp offset and is available with a 350mm length in three diameters -- 27.2mm, 30.9mm, and 31.6mm. 215 grams

User Reviews (85)

Showing 1-10 of 85  
d barry   Weekend Warrior [Jul 05, 2014]
Strength:

light weight, offset post feature, looks good.

Weakness:

I boutght this Easton EC70 seatpost less than a year ago mainly for its offset feature to adjust my ride position. And as far as the set up was concerned it worked out perfectly. However, after several mishaps riding where the seatpost dangerously slips I thought I had a frame problem. But I took the time to measure the post with digital calipers and it is manufactured undersized. I brought the 26.8 mm diameter version -- it measures out to 26.3 and is not actually round -- it is slightly flat on the back and front sides-- in other words it doesn't even meet its own specs and so is poorly manufactured. The bike shop where I purchased it would not replace it and applied some compound to it to help it stick -- this didn't work. I have had to replace the frame tightening bolt because I've been forced to overtighten it just to make it back home and broke the bolt. But something this simple should not become a problem in the first place.

buy something else or bring your digital calipers to the bike shop with you to measure it out before purchasing.

OVERALL
RATING
1
VALUE
RATING
1
Available At:
hookooekoorider   Cross Country Rider [Feb 25, 2013]
Strength:

Lighter than most aluminum posts, but not by much.

Weakness:

Broke going off a curb

Take this for what it's worth. I weigh 180 lbs. and used the EC70 seatpost on my hardtail Niner with front suspension. I did not use a torque wrench to tighten my seatpost clamp, but I also did not tighten the clamp hard. I also clamped an aluminum seatpost rack to the seatpost (generally not recommended), but had nothing on the rack at the time the seatpost broke. The seatpost gave me no problems for about 6 months, but I was mainly road riding, with the occasional cross country trail thrown in (single and double track, rocks, steps). BUT...I rode off a sidewalk curb, fully seated, yesterday and broke the seatpost about an inch above the clamp (and also an inch below where the rack was clamped on). Luckily, I was going super slow and did not get hurt. I would not recommend using this for mountain biking, unless the trails are smooth. Others have said it, but I'll say it again...get a Thomson. A 350mm Thomson Masterpiece with 16mm setback is 199grams, whereas a 350mm EC70 with 10mm offset is listed at 225grams.

And this is the word from seatposts.org:
"Where is the EC70 seatpost best used? It is good enough for just about any road bike, and it will hold its own with the best components. It’s durable enough for the rigors of road racing, but unless you are a lightweight rider (under 200lbs) and you ride smooth cross country trails only, this is not the seatpost for a mountain biker. The last thing you want to do is squander $130 for a cracked seatpost because you flew off a drop at speed – of you are going to get at all airborne on your mountain bike, there are stronger seatposts that are close to the weight of the EC70. Likewise, heavier riders should seek out a stronger (like a mountain-specific) seatpost to protect their investment."

Similar Products Used: Race Face Evolve XC, Titec Hellbent
OVERALL
RATING
3
VALUE
RATING
4
Volare   Weekend Warrior [Oct 09, 2011]
Strength:

It looks fancy

Weakness:

Pretty much the same as everyone else. When tightened as recommended, it slips about .5" every mile or so on moderate XC trails. Toaday it broke altogether see below for more details.

I've ridden this seat post and xc lite carbon handlebars for about 300 miles. The handlebars are great, no complaints. This seat post however is ridiculous. It slips when properly tightened at the clamp. Today the epoxy that adheres the carbon to the aluminum clamp failed and if I hadn't reacted so quickly would have impaled myself. I was riding on a flat section of trail, no roots or bumps and all the sudden, pop. There I stood getting eaten by mosquitoes while I picked my saddle off the ground and tried to figure out how to carry it while riding back to the parking lot 3 miles away.

Similar Products Used: Specialized, Thompson aluminum posts
OVERALL
RATING
1
VALUE
RATING
1
Available At:
jimbsport   Weekend Warrior [Sep 24, 2010]
Strength:

lightweight easy to adjsut with the two bolt

Weakness:

none yet

at this price it's a great upgrade that you won't regret, confortable, lightweight easy to adjust

Similar Products Used: bontrager and specialized generic seatpost
OVERALL
RATING
5
VALUE
RATING
5
pedalitup   Cross Country Rider [Mar 14, 2010]
Strength:

Micro adjustable clamp. Strong enough for this bike. Fifty two bucks on clearance.

Weakness:

The cutout stess reliever allows dust and water to enter the seat tube. No good if you're gonna use this on a bike where saddle height needs to vary. Lots of negative reviews on this board.

I borrowed and tested this post a few months ago on my road bike. Easy to setup and superb ride with no slippage. At list it was overpriced. Found it on clearance for this new bike. I will post updated review if it fails during prolonged use.

The EC-70 was priced to sell and I weigh 130. . .

I ignored previous negative reviews and "rolled the dice" on this one. Its light, strong, beautiful and matches this build flawlessly. The bike is fast, comfortable and weighs under 17 lbs.

As far as using this post on my hardtail XC bike, NO WAY, the Thomson Elite stays put! Its a no brainer to anyone who inspects both posts carefully. One is a reinforced plastic tube glued into a copy of a patented Thomson clamp, the Thomson being simply the best there is. Choose your equipment accordingly.

I leave the bottom line on this to an article I found on EASTONs website concerning appropriate component selection:

"So, if you’re the adventurous sort that blazes new trails and tends to leave the bike a lot. Aluminum or thicker-walled carbon bars will work for you. If you are more the elite cross-country rider that finesses the trails you can choose a lighter bar regardless of materials. This advice applies to other components as well: seat posts, stems, forks, etc.
The bottom line is that while there are a lot of components available, it is important that you choose the right one for your intended riding style. One size does not fit all."

Similar Products Used: Thomson, Titec, Ritchey and various generic OEM
OVERALL
RATING
4
VALUE
RATING
5
Available At:
El Baelos   Cross Country Rider [Dec 26, 2009]
Strength:

light, filters small vibrations very well

Weakness:

none

When I read all the comments here after I ordered the seat post, I was quite afraid about the quality.
But this seat post is simply great.
I fastened it by hand, and didn't touch it any more for a year.
Last week I bought a torque key and checked the torque: it was fastened way too hard all the time, but it never broke.
Now I reduced the torque and it still doesn't slip.
Great seat post

Similar Products Used: standard alu Scott seat post
OVERALL
RATING
4
VALUE
RATING
5
Brent   Cross Country Rider [Nov 21, 2009]
Strength:

Light

Weakness:

None yet

Great seat post with no issues yet. For all of you out there who are crying over broken seat posts (+ risk being de-genied), what are you doing taking hits / riding agessively while ON the seat. Give me a break...

Similar Products Used: Easton EA50
OVERALL
RATING
5
VALUE
RATING
5
Available At:
kurtwz   Cross Country Rider [Jul 07, 2009]
Strength:

Light

Weakness:

-Design flaw in the clamp causes the seat bracket to slip allowing the saddle to pitch upward causing pain and potentially harm to the testicles and other organs down there (sterility/impotence anyone?).
-Non-existent product support after I made a complain to BikeSource and directly to Easton.
-After I decided that a replacement bracket may be all that's needed, I spent the bucks to order one (because Easton made me) and 1st: they make it very hard to place orders for replacement components, 2: they sent the wrong bracket the first time, 3: the replacement did exactly the same thing after a matter of ~5 hours riding time.
=====
There's no other place to mention this, so I'll do it here: I weigh ~195, which surely is part of the reason why the clamp gave out, but it fails when riding on paved streets and when the bolt is as tight as I can make it w/ automotive mechanic's tools. Surely even a light 150 LB rider will place that amount of weight on the saddle when traversing rough terrain.

Product w/ an intolerable design flaw by a company that doesn't stand behind their product and doesn't make it easy to get replacement parts.

OVERALL
RATING
1
VALUE
RATING
1
FrancoisTX   Cross Country Rider [Nov 23, 2008]
Strength:

Light, nice, comfortable

Weakness:

broken after 6 months.....

I m heavy but on the web of manufacturer or the shop, no restriction....
Broken on a flat trail, nothing special and no alert...
2 weeks without bike and big big injurys to my geni.....

Customer service of Jenson was perfect, thank you

OVERALL
RATING
1
VALUE
RATING
2
Available At:
Bikesair   Weekend Warrior [Oct 15, 2008]
Strength:

Looks very slick. Light weight compared to most seat-post's. I like the two bolt design which keeps it very simple.

Weakness:

None

This seat post is a great post. I don't know about everyone else but mine had torque spec's for the aluminum fasteners and really has never slipped on me yet. A lot of people complain of it breaking which an Easton employee told me was 'from user error'. I have seen some of the testing they put these things through and I highly doubt failure was a result of poor manufacturing.

Great budget seat-post. If you every find a Thompson Masterpiece that's in your price bracket...go for that thing.

Similar Products Used: Thompson Elite, Thompson Masterpiece, Specialized stock post.
OVERALL
RATING
4
VALUE
RATING
4
Showing 1-10 of 85  
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