The Syncros FL Seatpost uses forged 7075 aluminum alloy, and comes in the usual sizes of 27.2, 30.9, 31.6mm and lengths of 350 and 400mm. It’s not a light seatpost, coming in at 223.2 grams in the tested 30.9×400 size, but it was plenty stiff, and I never felt any flex nor sloppiness from either the post or clamping system. It comes in HP Black, HP Black with Grunge (tested), Matte White and Matte White with Grunge. The Grunge graphics did seem to get scratched in places, but the height adjustment numbering on the rear of the post has been very durable.
The FL Seatpost design is a slight departure from its predecessor and most other double bolt systems, as the post has the convex surface, and the saddle rail cradle is concave. The design uses a pair of opposing bolts, which start on the post, and go up past the saddle rail cradle and into the upper clamp, where a set of threaded barrel nuts reside. The saddle rail cradle can be swapped forward or backward, allowing a subtle amount of layback offset. The system is relatively easy to use once the rails are in place, but it can be a slight fumble finger mess getting them into a stable position. Once the saddle is somewhat stabilized, you can make micro adjustments for the desired saddle angle and lateral positioning, although it can be tough squeezing in a hex key. One issue I had was that a lot of modern frames have some pretty slack seat tube angles, and you might not be able to level the saddle without using a longer bolt? A lot of these issues are common to this type of clamping systems, so the FL Seatpost is not in the minority.
Overall the FL Seatpost was a good post, it was stiff, durable, and looks nice (loved the HP Black Grunge), but I am not a fan of the two bolt clamping system any longer, and I had issues in a frame with slack seat tube angle. Their design of the clamping system is unique and does allow some offset tuning. I have had a Syncros Ti seatpost for almost 20 years (?), so they are long lived.
223.2 grams – 30.9×400
Overall Rating: 3.5 Flamin’ Chili Peppers
Syncros FL Seatpost Company Specs
3D Net forged 7075 alloy
Diameters: 27.2 / 30.9 / 31.6mm
Lengths: 350 / 400mm
Finishes: High polish black, HP black with grunge, matte white, matte white with grunge
Weight: 222g (30.9 x 400mm)