Diameter: 27.2 / 30.9 / 31.6 / 34.9 mm

Lengths: 200, 220, 250, 280, 300, 350, 400, 450 mm

Weight: e.g. 27.2 x 350 mm 110 g

1k fabric with red / white or white logos

maximum comfort thanks to noticeable flex

Also for oval saddle racks up to 8 x 12 mm

Inner diameter fits Di2 battery

Availability: Products displayed as “in stock” will be delivered within 48 hours. Items on backorder will be dispatched within 3 weeks.


Like all our products, our SL carbon seatposts are hand-wound. Compared to standard carbon seatposts, these lightweight full carbon seatposts are designed to yield more vertically without losing lateral or torsional stiffness, resulting in a noticeably more comfortable ride without any loss of energy. The head clamps the saddle frame at 4 points. Thanks to the slightly rounded aluminium clamping parts and the large contact surface of the carbon half-shell, even sensitive carbon saddle racks are not subjected to excessive stress. The saddle mount is designed for both oval and round saddle racks. The width must not exceed 8 mm and the height 12 mm.

The 6 mm Ti6Al4V titanium bolts are designed as expansion bolts to withstand MTB stresses without damage.
The tube is only constructed from up to 23 extremely thin layers of carbon fibre prepreg in the particularly stressed areas. In the stress-free zones, this number drops to 7 layers. Unfortunately, this sophisticated construction is very complex and cannot be realised in Asia. Cheap “Chinese seatposts” are only built with a constant wall thickness, which greatly simplifies production but adds unnecessary weight. For lightweight carbon seat posts in particular, countless test bench trials are necessary to work out the optimum design for each length and diameter.

Ordering information

Our seatposts are reinforced where they are loaded by the seatpost clamp, so they must not be sunk too far into the frame! Please do not buy a seatpost that is too long in order to saw it off! We want to customise the overall length and flex of your seatpost as much as possible. Therefore, please measure the extension of the seatpost from the top of the frame to the centre of the saddle rails. You can then use this measurement to determine the required overall length of your carbon seatpost using the table above. For example, if your exposed seatpost length is 170 mm, the 280 mm seatpost is the best for you (length outside the frame in mm 150 – 200). The 250 mm seatpost would be too short (length outside the frame in mm 125 – 175). Please let us know the measured extension!
For dealers, we offer the seatposts in 2 standard lengths with a larger adjustment range in order to keep stock levels low.

Surface finish

All our lightweight carbon seatposts are unpainted to avoid adding unnecessary weight. Above all, the epoxy surface is much more resistant than any paint finish. It is therefore not scratched so quickly. All our lightweight carbon seatposts come in the current matt look. SL seatposts come in the classic 1k weave carbon look with (biaxial) crossed fibres. Find out more about 1k here.

Assembly Instructions

Always use a torque spanner for installation!

Do you have special requests or would you like to have different components fitted to your bike? Let us know how you envision your custom bike. We will work with you to build your dream bike: to the contact form.

Seatpost SL



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