RideDNA 30.9mm > 27.2mm Seat Post Shim // CNC 6061 Aluminum

Precision engineered CNC 6061 Aluminum Alloy 30.9mm > 27.2mm Seat Post Shim. Provides multiple options For Seat Post selection including both dropper posts and rigid.  

RideDNA is a simple, easy way to customize your bicycle to fit the way you want to ride.