Darimo Seatpost for Specialized / S-Works Tarmac SL7
💡 Crazy fact
The Specialized S-Works Tarmac SL7 is so light that pro builds have dipped under the UCI’s 6.8 kg limit. Swap the stock aero seatpost for a Darimo SL7-specific carbon seatpost and you’re not just saving grams — you’re pushing right up against the absolute minimum legal race weight 🤯
💥 Why this combo is pure magic
- 🔧 SL7-specific aero fit – designed for the Tarmac SL7’s proprietary aero seatpost profile. Not round, not interchangeable.
- 🪶 Ridiculously light – from around 95 g depending on configuration. Roughly half the stock S-Works post.
- ⚡ Sharper acceleration – removing ~80–90 g high up in the frame makes the SL7 feel more responsive on climbs and out of corners.
- 🧬 Hand-laid carbon – handmade in Spain using high-modulus carbon, tuned for stiffness where it matters and compliance where it helps.
- 🔩 Purpose-built hardware – correct cradle options for modern carbon saddle rails.
- 🌈 Finishing details – titanium hardware with anodised colour options for riders who care about the last 1%.
- 🧘 Comfort without deadness – subtle engineered flex takes the edge off rough roads without muting road feel.
⚖️ Real-world weight savings
Specialized S-Works SL7 aero seatpost: ~180 g
Darimo SL7 carbon aero seatpost: ~95 g
Typical saving: ~85 g
That’s like dropping a full espresso shot off the bike ☕💨
🛠️ Installation notes
- ✅ Tarmac SL7 only — model-specific aero seatpost.
- ❌ Not compatible with SL8 or round 27.2 mm frames.
- Install using carbon assembly paste and follow Specialized’s recommended installation and torque guidelines.
- Compatible with 7×7 mm round and 7×9 mm oval carbon rails (correct cradle required).
- ❌ Do not cut the seatpost — Darimo seatposts are engineered to be extremely lightweight and are not designed to be cut. Cutting may compromise structural integrity. Ensure correct saddle height before ordering.
- Standard rider recommendation: up to 90 kg. Reinforced layup available for heavier riders (adds <20 g).
🧡 Why riders love it
If you already ride a Tarmac SL7, this is one of the few upgrades that still makes a meaningful difference. It keeps the aero shape Specialized designed, cuts serious weight where it counts, and turns an already elite bike into something genuinely special. It’s also the part that makes people pick the bike up… and swear 😎
🧭 FAQs
Compatibility note: This seatpost is SL7-specific. If you’re unsure which Tarmac you have, contact us before ordering.