The K-Force Light SB25 post's one-piece carbon fiber shaft and head are topped off with a forged alloy Minimal Top Clamp, giving a full range of adjustment and secure saddle mounting at a very low weight. There's also the option of mounting a Shimano Di2 battery in the bottom of the post. - Forged alloy Minimal Top Clamp (MTC) - One-piece continuous carbon fiber construction - Fit 7mm standard rails and 7x9mm oval rails - Weight: 204 grams

With shaft and head formed from one continuous carbon fiber section, the K-Force Light SB0 seatpost is both light and strong. The K-Force Light SB0 features a zero-offset (in-line) clamp for a forward saddle position, with our forged alloy Minimal Top Clamp holding the saddle securely. - Forged alloy Minimal Top Clamp (MTC) - Increased setback for correct fit and saddle support - One-piece continuous carbon fiber construction - M5 chromoly and stainless steel hardware design - Zero Setback - Fits 7mm standard rails and 7x9mm oval rails - 185 grams

The directional butting of the Energy SBS SB20 seatpost’s 6066-aluminum shaft gives it thicker walls fore and aft for stiffness and thinner walls at the sides to cut weight. A forged and machined alloy head is bonded to the top of the shaft. - 3D forged and CNC machined AL6066 w/ alloy head - Directionally butted for low weight and additional strength - Chromoly hardware - Clamp Style: Standard Rails

FSA's Metropolis seatpost is CNC machined from AL6069 aluminum and features a forged alloy single-bolt head with chromoly hardware. Simple and elegant, this seatpost gets the job done weighing a scant 257 grams.

FSA's SL-K Seatpost is lighter and stiffer than ever! Using a UD carbon shaft with a bonded alloy head and a brilliant ITC clamp design, FSA has achieved what they believe is the finest seat post yet. The ITC clamp design allows you to adjust offset to 0mm or 15mm for fine-tuning your saddle position. - UD Carbon shaft, 2-bolt SBS alloy head, and chromoly hardware - Min. Height: 40mm

The new SL-K SBS SB0 seatpost is lighter and stiffer than ever. Using a UD carbon shaft with a bonded alloy head and a sophisticated SBS clamp design, we can achieve what we believe is the finest SL-K seatpost yet. Available with a polymer Di2 battery holder. - UD carbon shaft with bonded alloy head - Forged alloy "SBS" 2-bolt head - Chromoly hardware - 20mm setback - Fits 7mm standard rails and 7x9mm oval rails - 221 grams