Light & Motion Vis 180 Pro Aero Seatpost Mount Adapter [804-0207-A] | eBay
Unique Bargains 31.8 to 34.9mm Bike Seat Post Tube Adapter Seatpost Reducing Sleeve Shim Adapter Aluminium Alloy Black - Walmart.com
Aventon Mataro Aero Seatpost cover by MaxStahl | Download free STL model | Printables.com
Giant Propel has an aero seatpost, and neither of three supllied Varia ' adapters' can fit onto it. So I designed and printed my own adapter. : r/bicycling
Cat Eye Aero Seatpost Adapter For Rapid X3/X2/X at TriSports
33.9-36mm Bike Seat Post Shim Tube Sleeve Reducer Seatpost Adapter | eBay
lhunter.com Aero seatpost taillight adapter
Bicycle Seat Post Shim Sleeve For Seatpost Adapter 22.2 to 25.4, 27.2 to 31.8 | eBay