Ritchey Classic Seatpost 25mm Offset - High Polish Silver Size:30.9mm single) is not compatible with

single) is not compatible with 2X (2-speed

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Ritchey Classic Seatpost 25mm Offset - High Polish Silver Size:30.9mm single) is not compatible withThe proven 2 bolt design on this classic provides a class leading balance between strength, weight and adjustability. The two bolt design is easy to adjust and holds tight. Its low profile clamp reduces stress on lightweight rails and won't bottom out, and the bolts are oriented to the axis of the rails for greatest contact area with the saddle. The Classic also features Ritchey's 'Classic' high polish silver finish. Specifications Material: 2014