The K-Force Light SB25's one-piece carbon seatpost and head tube are complemented by a forged alloy Minimal Top Clamp that provides a full range of adjustment and a secure saddle fit at a very low weight. There is also an option to mount a Shimano Di2 battery at the bottom of the seatpost. Forged alloy Minimal Top Clamp (MTC) One-piece continuous carbon fibre construction Finish: UD carbon finish Colour graphics - black Weight - 204 grams (Ø27.2x350 mm)