It's what's inside.
For Shimano's Di2 MTB drivetrains, the PRO Tharsis XC Carbon Seatpost is designed to conveniently house a Di2 battery for the cleanest electronic drivetrain setup for your cross-country bike. The unidirectional T700 carbon is plenty strong, lightweight, and has a matte finish for a clean, stylish look. Up top, Shimano's 1-bolt clamp system offers a wide range of angle adjustments that are easy to make whether in the stand or on the trail.
400 mm length. 0° offset. Claimed weight is 199 g (27.2 mm diameter).
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