Syntace P6 Seatpost review

The perfect seat post

Our rating 
4.5 out of 5 star rating 4.5
GBP £109.99 RRP | USD $179.99
Syntace P6 Seatpost

Our review

Best clamp system on the market; the perfect post
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Carbon seatposts are pretty much standard on bikes above £750, and you could easily think they’re much of a muchness, but the P6 stands above the horde: it’s smart and beautifully made.


It has a quality carbon tube, and is finished with a deep epoxy coating (cleverly, the height markings are under this so they won’t be scratched off), but the important part is the head: the P6 has simply the best two-bolt (titanium) fixing system we’ve ever used.

Fitting a saddle is easy, and the ball-ended bolt design enables you to adjust the pitch while micro adjustments can be made with minimal Allen key rotation; it’s surprising how little you have to tighten the rails to keep them movement-free. 

The cradle has a narrow top section (23mm) and a very long bottom (53mm) allowing the saddle to be set well back, but this can be flipped to create a forward-seating position for TT. In fact, this design pretty much eliminates the need for a layback post. 

At 244g for a 400mm post it’s right there in the lightweight stakes.

It comes with a Syntace Allen key and friction paste to prevent the post slipping in a carbon frame.


Sizes: 34.9, 31.6, 30.9, 27.2mm dia; 480 (for 34.9 dia), 400, 350, 280mm length

Product Specifications


Name P6 Seatpost
Brand Syntace

Available Colours Carbon
Seatpost Brand Syntace
Seatpost Model P-6 Carbon
Material Carbon
Lengths Available 280mm 350mm 400mm
Diameters Available 27.2mm 30.9mm 31.6mm 34.9mm