Gemini ÄLSAK Carbon Seatpost for Specialized Tarmac SL8 / SL9 / Crux 5 – 300 mm

Refine your Specialized build with the Gemini ÄLSAK carbon seatpost. Handcrafted in Barcelona, this 300 mm seatpost combines a hollow carbon monocoque body, forged carbon saddle clamp and titanium hardware in a clean, minimalist design.

Its continuous carbon shell is engineered to minimise weight through careful material placement. The saddle cradle provides a broad support surface for the rails, while the zero-offset design suits riders seeking a more forward saddle position.

Key features

• Hollow carbon monocoque body: an efficient structure designed for low weight.

• Forged carbon saddle clamp: lightweight construction with a broad rail support area.

• Titanium hardware: titanium bolts and pivots throughout the clamping system.

• Zero offset: 0 mm setback for a forward saddle position.

• Saddle rail compatibility: accommodates standard round and oval rails.

• UD matte finish: understated black carbon with a matte lacquer.

• Handcrafted in Barcelona: designed and manufactured in-house by Gemini.

Specifications

• Frame compatibility: Specialized / S-Works Tarmac SL8, Tarmac SL9 and Crux 5

• Length: 300 mm

• Offset: 0 mm

• Body: carbon fibre monocoque

• Saddle clamp: forged carbon

• Hardware: titanium

• Standard finish: UD matte

Sizing and installation

Choose the correct length for your required saddle height and Gemini’s permitted clamping range. The ÄLSAK seatpost must not be cut. Contact Machine for help confirming frame compatibility and sizing before ordering.