Gemini ÄLSAK Carbon Seatpost for Specialized Tarmac SL8 / SL9 / Crux

The ÄLSAK aero post, built specifically for the Specialized Tarmac SL8, SL9 and Crux. Made to fit — not adapted to fit.

Frame-specific aero posts are usually a heavy afterthought from the frame maker. Gemini's version applies the same construction as the round ÄLSAK — carbon monocoque, forged carbon clamp head pressed at over 100 tons, full titanium hardware — shaped to your frame's exact seat tube.

The essentials

• Frames: Specialized / S-Works Tarmac SL8, SL9, Crux
• Construction: unibody carbon monocoque · forged carbon head · titanium hardware
• Clamp: fits round and oval rails
• Laminates: Lightweight (up to 90 kg) / Performance (up to 120 kg)

Finish

UD matte standard; UD gloss, 12K gloss and 12K matte available, plus Custom Lab one-of-one finishes.

Made to order

Typically four weeks. We confirm the lead time in writing before taking payment — and we confirm your frame year and size in writing before the order enters production. Three-year warranty and crash-replacement programme.