- Familiarity: I've used it several times
This is an awesome seatpost. Sure, it is relatively light. But, that is not why I bought it. I bought it for comfort. A word about comfort. If you look across the web, the only negative reviews of the Syntace P6 say something like, “This thing doesn’t live up to its claims (note: what claims?); it doesn’t have as much compliance as my Thudbuster.” Or, “I couldn’t bend in my hands.” Or, “I sat on it and I couldn’t feel it move.”. Well... those are silly comments. This is not an active suspension seatpost. It is a wonderfully designed, wonderfully manufactured compliant seatpost.
I bought this to replace a Fizik Cyrano R5, which is also an excellent, very light seatpost. But, in 31.6 diameter that I needed, it was just too harsh. On another bike, I have a 27.2, which is pretty nice.
By comparison, the Syntace, also a 31.6, is a revelation. The vibration from crappy, pebbly blacktop just disappears. Descending a steep bridge with metal “tent” covers over the compression joints I was no longer propelled off the saddle like I was before.
Of course you can feel bumps. When the road goes up, the bike must go up, and the person on the bike must go up. The harsh jolt is gone. The up is damped and lessened considerably. Compared to an alloy post, you can just sit (if you want to); you don’t have to unweight by semi-standing on the pedals in anticipation.
I have never had any other carbon seatpost so I can’t compare it to others. The Syntace is wonderfully finished. It is light, but not the very lightest—you don’t want it to be. You want it to be safe and reliable as well as light and comfortable. The head is NOT bonded on as some reviews state: it is part of the carbon layup, but it is solid carbon. Syntace says max bolt force on the head bolts is 8nm. I used a 5nm torque wrench and didn’t get all the way to the click at 5. The seat does not move. It absolutely does not ping or creak. It is easy to adjust saddle tilt (I am a leetle OCD about saddle tilt). It as easy to make tiny, precise adjustments—and big ones if you need to.
This is just a really great product.
Mfgr offers a 10 year warranty, not 1 year as stated incorrectly in Competitive Cyclist’s description above.