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).
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
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