Specialized Tarmac SL6 Roval Pave & Alpinist Seatpost Di2 Battery Mount

Specialized Factory Internal Shimano Di2 Battery Seatpost Mount Plug Kit

Keep your internal Shimano Di2 battery secure and quiet with this Specialized factory replacement battery seatpost mounting plug kit. Designed to work specifically with the BT-DN110 and BT-DN300 batteries, this OEM plug kit fits cleanly inside compatible carbon seatposts (Pavé, Roval Alpinist, and Tarmac SL6), helping prevent movement, noise, and unwanted play while maintaining a sleek, integrated look.

Features & Benefits

• Compatible with: Shimano Di2 internal batteries BT-DN110 and BT-DN300

• Fits inside: Specialized carbon seatposts

  • Pavé

  • Roval Alpinist

  • Tarmac SL6

• OEM factory replacement: Direct fit to original seatpost specifications

• Purpose: Secures battery in place, reduces noise, and protects against movement

• Clean aesthetic: Maintains the integrated appearance of Di2-equipped bikes

Why You Need It

• Ensures your Di2 battery stays centered and silent inside the seatpost

• Helps eliminate rattle and vibration during rides

• Ideal for service replacement or collision repair

Typical OEM Applications

(This plug kit is designed for seatposts from the following Specialized bikes — model year shown where applicable.)

2027

• Roval Alpinist Seatpost

2026

• Roubaix SL8 (S-Works & standard)

• Crux (S-Works, FACT 12r Carbon & DSW)

• Aethos 2 (S-Works & standard)

2025–2024

• Roubaix SL8 (all trims)

• Crux (framesets & complete bikes)

• Aethos / Aethos Sport / Aethos Pro / S-Works Aethos

2023 and earlier

• Tarmac SL6 (including Sport and Tiagra variants)

• Roubaix & Crux trims

• S-Works Pavé SL Carbon Seatpost applications

(Seatpost model is the true compatibility reference — confirm Pavé, Alpinist, or Tarmac SL6 carbon seatpost before ordering.)