Exposure Boost R Aero Seatpost Band & Shim Bike Light Mount | SDJ Sports
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