Section 11.1 of the user manual (General,Specifications) for the Como states “Seatpost Diameter = 34.9mm.” The diagram of the bike, specifically, #9, (Como Components) identifies the wide part coming up from the seat tube, as the “Seat Post.I suspect the “sleeve” is the same same diameter as the “seat post”.
Can someone just let me know if I need a 30.9mm to 34.9mm shim?