When it comes to cockpit bits, there’s no other lineup that’s more tour-proven than FSA K-Force. I’ve had a full K-Force cockpit and both the SB0 and SB25 seatposts in for review aboard the Orbea Orca M-Team.

FSA K-Force Seatpost Features:

  • Forged alloy Minimal Top Clamp (MTC)
  • One-piece construction
  • UD carbon finish
  • Fits 7mm rails (carbon or alloy)
  • Diameter: 27.2 or 31.6
  • Lengths: 350 or 400mm
  • Available in SB0, SB25 and SB32
  • Claimed Weight: SB0 (181g), SB25 (210g)
  • Price: $219

FSA K-Force SB0 and SB25 Seatposts

Get the good kind of setback

FSA is by far the most common cockpit group among WordTour cycling teams. Their tried-and-true cockpits are well-tested and trusted by the most capable riders on the most demanding courses in the world. Now, seat posts may not seem all that interesting, but the lonely seatpost plays a huge part in both bike fit and comfort.

To aid in proper bike fit, FSA offers their K-Force seatpost in 0mm, 25mm and 32mm setback options. Consequently, both the setback options not only expand the cockpit length, they also up the comfort level — due to the angle of the setback.

I’ve been riding both the SB0 and SB25 aboard the 2015 Orbea Orca M-Team and I can attest first-hand to the improved comfort when going to a SB25. But, at the same time, I really need the SB0 to achieve my proper fit. So, in my case, I was happy to give up a slightly softer ride for a proper fit. Consequently, you’ll have to decide for yourself as well. In my mind, fit should be king — always.

FSA K-Force SB0 Seatpost

Installation is very easy, due to the Minimal Top Clamp design. These dual clamps are easily twisted sideways for saddle install and then rotated in place to secure the perch. It all happens without parts and pieces falling all over the place. So, kudos for the intuitive and easy-to-use clamp design.

Unfortunately, the recessed location of the clamping bolts makes torquing difficult. Both torque wrenches I own weren’t long enough to reach the bolts, so I guessed on the proper torque for the saddle rails — not the ideal, but I had no choice. I had the same luck with multi-tools as well. So, get the saddle position absolutely nailed prior to departing on that inaugural ride, or carry a proper Allen wrench. With the right wrench, performing micro-adjustments and leveling the saddle is a breeze (thanks to the MTC system).

I’ll add that, after some investigation, I found that the aluminum lower rail clamp squeaked a little as it rubbed against the carbon post. A little carbon paste has solved that issue completely. And, of course, use the included carbon paste on the inside of your seat tube and seatpost to improve clamping and reduce squeaking.

The Good

  • MTC system makes saddle changes a breeze
  • Easy to level the saddle
  • Compliance increases as setback increases
  • A variety of sizes and setback options
  • Compatible with carbon or alloy rails without adapters

The Bad

  • SB25 and SB0 can’t be adjusted with most multi-tools or torque wrenches (due to recessed bolts)

Bottom Line: FSA K-Force Seatposts

FSA doesn’t mess around with anything but the best for both professional and recreational riders. There’s little to quibble about with the FSA K-Force SB0 or SB25 seatposts — choose the one that enables the proper fit for your bike.

Buy Now: Available at JensonUSA.com

About Author

A Seattle native, Jason developed a love for the outdoors and a thing for mountains. That infatuation continues as he founded this site in 1999 --sharing his love of road biking, mountain biking, trail running and skiing. That passion is channeled into every article or gear review he writes. Utah's Wasatch Mountains are his playground.

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