reason for the Circuit clamps beauty. The secret is in the details, rounded edges and a minimal amount material create a clamp with the perfect touch of refinement and Deity style.
The Ritchey Di2 Seatpost battery mount securely mounts ...
a Di2 battery inside a round seatpost (Di2 battery not included). Compatible with all Shimano Di2 batteries including 12-speed (BT-DN110 & BT-DN300).