Service Course Seatpost 27.2 - Black Offset:20mm Wider range and smooth gear

Wider range and smooth gear steps for 1x11 system

Surly left it a bit flexy to take some of the harsh out of your ride

Stiff foam is located on both sides and bottom

The unrivaled Triangular Core Matrix offers the best warmth-to-weight ratio of any air sleeping pad construction

70mm Fillmore Valve - fits Rim Depths between 30mm to 48mm

Service Course Seatpost 27.2 - Black Offset:20mm Wider range and smooth gearDescription Designed for riders who demand comfort, strength, and precise adjustability, the ZIPP Service Course Seatpost delivers proven performance in a lightweight, durable package. Constructed from 3D forged 6061 aluminum, this seatpost balances stiffness and compliance for confident handling on any ride. Whether racing, commuting, or adventuring, the two bolt micro adjust head allows precise saddle positioning, while the 20mm offset ensures