FSA K-Force Light SB25 Seatposts

5/5 (4 Reviews)
MSRP : $220.00


Product Description

The FSA K-Force Light Seatpost uses one-piece continuous carbon fiber construction with FSA's Minimal Top Clamp (MTC) design. For strength and lightweight, M5 chromoly and stainless steel hardware is used in the seat clamp. The K-Force Light SB.25 feature


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Reviews 1 - 4 (4 Reviews Total)

User Reviews

Overall Rating:5
Value Rating:4
Submitted by Alex Buller

Date Reviewed: October 19, 2014

Strengths:    Very comfortable. maybe because my road bike came equipped with the standard alloy seatpost but the difference between this and the alloy was night and day. vibrations are well absorbed. my bottom thanks me.

Weaknesses:    price, unless you can find it on sale like i did.

Bottom Line:   
I bought this after reading a Velo article where they scientifically tested numerous seatposts for different things such as stiffness, compliance and vibration absorption and other factors. They ranked this seatpost the best among its peers and they highly recommended this seatpost based on its ability provide a very comfortable ride as absorbs road vibrations very well yet not being too flexy. I bought the seatpost and was very happy to find that they were right. This is probably the best seatpost you can buy. The the seatpost seems to be the perfect balance of stiffness and compliance. I never thought that a well designed carbon seatpost as well as well designed carbon dropbars could make such a noticeable difference in the ride quality but they certainly do. The FSA K-Force Light SB25 along with the 3T ergonova Team bars on my bike turned an reasonably comfortable bike into an all day super comfort machine.


Overall Rating:5
Value Rating:4
Submitted by FNGRIDER a Recreational Rider

Date Reviewed: September 11, 2011

Strengths:    Beautiful. Light weight. one piece monocoque.

Weaknesses:    price is high. Last years model had the weave finish. this years is carbon unwoven.

Bottom Line:   
SB 25 one piece monocoque carbon flber
very areo design with red and white FSA graphics on the sids. Includes. Carbon assembly paste. about 8 grams lighter than the stock Ritchey carbon post. I purchased this post to match the K Force stem/K-Flight bars and K Force crankset. It finishes off the already asthetic profile of the Wilier frame/colors.

Expand full review >>

Favorite Ride:   PV over Hawthorne/PV East

Price Paid:    $190.00

Purchased At:   Summit Ski and Cycle

Similar Products Used:   Ritchey carbon. two piece, carbon/aluminum mount

Bike Setup:   Wilier Izoard Ultegra - Vuela Corsa Superlight Wheelset/Continental 4000s, Speedplay Zero Ti pedals, FSA K Fcorce crankset,stem,seatpost, K-flight bars


Overall Rating:5
Value Rating:4
Submitted by iploya a Road Racer

Date Reviewed: June 23, 2011

Strengths:    Beautiful, especially when installed. Good clamp design that is easy to fine-tune.

Weaknesses:    Perhaps a tad heavier than some competing all-carbon posts.

Bottom Line:   
This is an "initial impression" review to be updated. Overall, this is a beautiful seatpost that is reasonably light and is relatively easy to install and adjust.

The K-Force Light comes in 3 different versions: SB0 (zero setback), SB25 (25mm setback), and SB32 (32mm setback). (NOTE: This review category is for the SB25.)

The setback in the SB25 (and the SB32) is achieved through a monocoque (i.e. one-piece) carbon construction. This is nicer-looking and more expensive to achieve than cheaper posts that achieve their setback by simply bonding a straight piece of carbon tubing to a setback-type aluminum clamp (e.g. on the EC70).

While the post itself is formed entirely of carbon, the clamp does use some aluminum clamp members, including 1 lower piece and 2 upper pieces (a separate bolt passes through each upper piece). The design works well. As with many seatpost designs, the clamp is initially a bit clumsy when installing onto the rails of your saddle. However, the installation is simplified by having the two separate upper pieces that you can individually seat on the rail during installation, which I found less cumbersome than on the EC90 which has a solid upper piece. The 2-bolt clamp design provides infinite angle adjustability; to change the angle, you loosen one bolt a half turn and tighten the other bolt a half turn. On the SB25, the rear bolt is recessed well into the body of the carbon setback portion, so be warned you will not be able to adjust this on the road using a micro-tool. However, it is possible to loosen the clamp to make some limited fore/aft adjustments using just the front bolt, which is more easily accessible.

The post seems to run a tad bit heavier than the EC90 straight post I was using before, but is still fairly in the "lightweight" category. I suspect you gain a few grams for a setback version (more material) and the few small pieces of aluminum. Aftermarket Ti hardware is available for this particular model online.

Expand full review >>

Price Paid:    $170.00

Purchased At:   LBS

Similar Products Used:   EC90 straight post; proprietary aero Cervelo post.

Bike Setup:   Cervelo R3Sl - standard road bike setup.


Overall Rating:5
Value Rating:5
Submitted by Teschner_Fan a Road Racer

Date Reviewed: August 30, 2009

Strengths:    Light, shiny and did I say beautiful

Weaknesses:    I guess there are cheaper seatposts out there but why bother

Bottom Line:   
Beautiful piece of carbon. Does all that you need from a seatpost plus looks beatiful to boot

Expand full review >>

Favorite Ride:   Old Freeway, Lofty, Norton and Greenhill home

Price Paid:    $100.00

Purchased At:   Chain Reaction Onlin

Similar Products Used:   Easton 70, FSA Alloy, Modolo

Bike Setup:   Teschner Team Issue, dura ace groupset and wheels ( 7850 CL ), Look Keo pedals remainder is carbon FSA.



Reviews 1 - 4 (4 Reviews Total)

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