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Easton EC70 Carbon Seatpost
Product DescriptionThanks 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 
Submitted by
hookooekoorider
a Cross Country Rider Date Reviewed: February 25, 2013 Strengths: Lighter than most aluminum posts, but not by much. Weaknesses: Broke going off a curb Bottom Line: Expand full review >>Favorite Trail: Shell ridge Duration Product Used: 6 mos. Similar Products Used: Race Face Evolve XC, Titec Hellbent Bike Setup: Niner EMD 
Submitted by
Volare
a Weekend Warrior
from Williamsburg, VA Date Reviewed: October 9, 2011 Strengths: It looks fancy Weaknesses: 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. Bottom Line: Expand full review >>Duration Product Used: 3 months Purchased At: LBS Similar Products Used: Specialized, Thompson aluminum posts Bike Setup: Giant hard tail, X0 shifters and derailleurs, xt crankset, xt hydraulic discs, Fox 32 Float 140. 
Submitted by
jimbsport
a Weekend Warrior
from quebec Date Reviewed: September 24, 2010 Strengths: lightweight easy to adjsut with the two bolt Weaknesses: none yet Bottom Line: Expand full review >>Favorite Trail: J-bar Duration Product Used: Less than 1 month Price Paid: $43.00 Purchased At: jenson Similar Products Used: bontrager and specialized generic seatpost Bike Setup: gary fisher hi fi plus
Submitted by
pedalitup
a Cross Country Rider
from Oregon Date Reviewed: March 14, 2010 Strengths: Micro adjustable clamp. Strong enough for this bike. Fifty two bucks on clearance. Weaknesses: 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. Bottom Line: Expand full review >>Favorite Trail: The ones I ride to Duration Product Used: Tested or demo'ed only Price Paid: $52.00 Purchased At: Jenson Similar Products Used: Thomson, Titec, Ritchey and various generic OEM Bike Setup: Something you can't buy at a bike shop. Willier Mortirolo cyclocross frame built up as rigid 29'er. Winwood Dusty cross fork, Ultegra 32 hole hubs laced 3X to Velocity Aerohead rims, 35c SB8 tires, Shimano driveline: FC-700 50-34 crank, SL-R441 shifters, FD-R700 front derailleur, XT shadow rear derailleur and 11-34 cassette. Monkeylite XC SL bar with speed dial 7 and Avid SD7 V brakes. WTB Laser V ti saddle and Easton EC-70 post. And yes, the driveline shifts flawlessly despite being a bit outside Shimanos design specs.
Submitted by
El Baelos
a Cross Country Rider
from Ghent, Belgium Date Reviewed: December 26, 2009 Strengths: light, filters small vibrations very well Weaknesses: none Bottom Line: Expand full review >>Favorite Trail: Ardennes Duration Product Used: 1 Year Price Paid: $80.00 Purchased At: chainreactioncycles Similar Products Used: standard alu Scott seat post Bike Setup: Scott Scale '08 frame, DT-Swiss wheels (XR420D, XD240S), Formula R1 brakes, Ritchey WCS headset, Easton EA70 handlebar, Selle Italia SLR seat...
Submitted by
Brent
a Cross Country Rider
from Calgary, Alberta, Canada Date Reviewed: November 21, 2009 Strengths: Light Weaknesses: None yet Bottom Line: Expand full review >>Favorite Trail: Pneuma to moose Duration Product Used: 1 Year Price Paid: $69.00 Purchased At: Jenson Similar Products Used: Easton EA50 Bike Setup: 2008 Rocky Element 50
Submitted by
kurtwz
a Cross Country Rider
from Lenexa, KS, USA Date Reviewed: July 7, 2009 Strengths: Light Weaknesses: -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. Bottom Line: Expand full review >>Favorite Trail: Landahl Duration Product Used: 2 Years Purchased At: Bought bike from fri Bike Setup: Full suspension titanium Dean. 
Submitted by
FrancoisTX
a Cross Country Rider
from Spring, TX Date Reviewed: November 23, 2008 Strengths: Light, nice, comfortable Weaknesses: broken after 6 months..... Bottom Line: Expand full review >>Favorite Trail: Cypresswood Duration Product Used: 6 months Price Paid: $80.00 Purchased At: Jenson Bike Setup:
Submitted by
Bikesair
a Weekend Warrior
from San Luis Obispo, CA, USA Date Reviewed: October 15, 2008 Strengths: Looks very slick. Light weight compared to most seat-post's. I like the two bolt design which keeps it very simple. Weaknesses: None Bottom Line: Expand full review >>Favorite Trail: Seqioa's, Camp Nelson Duration Product Used: 3 months Price Paid: $89.00 Purchased At: PricePoint Similar Products Used: Thompson Elite, Thompson Masterpiece, Specialized stock post. Bike Setup: This is installed on a 06' Stumpjumper FSR Comp. I weigh 148lbs.
Submitted by
Justodd
a Weekend Warrior
from Silver Spring, MD, USA Date Reviewed: August 13, 2008 Strengths: I guess it looks cool, kinda. Weaknesses: What a piece of crap! Constant slipping of the clap which resulted in the nose sticking up toward the sky resulting in my balls getting shoved up to navel! Clamp failed during a ride, the thread stripped and yanked the bolt right through. This seat post has given me problems from the start. Bottom Line: Expand full review >>Favorite Trail: National Trail, AZ Duration Product Used: 1 Year Price Paid: $55.00 Similar Products Used: Thomson Elite...forget the EC70 and get the Elite Bike Setup: Cannondale F600, after market xt/xtr derailuers, crank bros egg beater pedals, WTB Weirwolf 2.3 in front, Kenda Nevegal 2.1 in back (both tube in)...everything else stock.
Submitted by
Tom Whitaker
a Cross Country Rider
from Santa Paula< Ca. USA Date Reviewed: June 11, 2008 Strengths: Wieght Weaknesses: None yet however, many people have issues with the post slipping down in the seat-tube. Easy fix...apply a small amount of valve lapping compound on the post were it will be clamped. Torque clamp properly.....no slipping!!! Regarding breakage, I suspect many are due to over tightened clamps, makes sense since they will slip if you don't use lapping compound. Bottom Line: Expand full review >>Favorite Trail: Ones with dirt Duration Product Used: 2 Years Price Paid: $90.00 Purchased At: Don't remember Bike Setup: Ventana X5, Fox 32 Talas RLC fork, Fox RP23 shock, Hope brakes, DT240 hubs/Mavic 717 rims/14,15 DT spokes,....etc., etc.
Submitted by
Hendra Widjaja
a Weekend Warrior
from Bali, Indonesia Date Reviewed: January 20, 2008 Strengths: Easton, lightweight, carbon fibre Weaknesses: Pricey, and I think the set back is way too much for my preference Bottom Line: Expand full review >>Favorite Trail: Jimbaran Duration Product Used: 6 months Price Paid: $81.00 Purchased At: Denpasar Similar Products Used: none Bike Setup: Giant MCM Team, mixed XT and XTR components.
Submitted by
Emil Roach
a Cross Country Rider
from Ontario, Canada Date Reviewed: September 24, 2007 Strengths: Looks, that's about all. Weaknesses: Catastrophic failure for the 2007 model EC 70 seatpost!!! I have been riding this post for approximately 6 months. I live in lower Ontario, Canada, so you can imagine that there aren't very many good or hard trails in the area. Luckily I was only riding to my friends house when this happened!!! Keep in mind I ride a dual suspension bike. I rode off of a 7inch sidewalk curb, and when my back wheel hit the street, all I heard was a laud POP! I got off my bike and the EC 70 Carbon seat post had cracked right in half about an inch above the seat collar. It was not over tightened or under tightened, and I weigh 175lbs. Be very weary of this product!!! I can't imagine what might have happened to me if I were riding in the trails!!! Bottom Line: Expand full review >>Favorite Trail: Don Valley Duration Product Used: 6 months Price Paid: $100.00 Purchased At: LBS Similar Products Used: 2006 EC70 (luckily didn't snap), other post's. Bike Setup: 2007 Giant Anthem 0 with Easton carbon post and handlebars
Submitted by
Mark Adams
a Cross Country Rider
from Findon ,West Sussex ,England Date Reviewed: September 2, 2007 Strengths: Great looks. Weaknesses: It will look scruffy fairly soon. Then it will break. Trust me. Bottom Line: Expand full review >>Favorite Trail: Surrey Hills Duration Product Used: More than 3 years Price Paid: $140.00 Purchased At: Chain Reaction Similar Products Used: Thomson Elite, Bontrager carbon. Bike Setup: Blur LT, Fox32 Talas, Hope/Mavic, Mono M4.
Submitted by
Jim
a Cross Country Rider
from Sheffield, UK Date Reviewed: May 23, 2007 Strengths: Looks, weight, function... Weaknesses: Only one - The bonding between the Carbon and the Aluminium upper failed (kicking me off the bike and injuring me in the process). Bottom Line: Expand full review >>Favorite Trail: Marin Trail, Betsy Coed Duration Product Used: 6 months Price Paid: $85.00 Purchased At: Ebay Similar Products Used: Easton EA70, Giant OEM Bike Setup: Giant Trance, Hayes Carbon brakes, XTR 2007 Groupset, F100X forks, Float R shock, Hope Pro 2 Hubs, Mavic Rims, Monkeylite XC Bars
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