KOM Cycling Garmin Varia Seatpost Mount Description: The KOM Cycling Garmin Varia seatpost mount provides a secure mount for your Garmin Varia RTL510, Garmin Varia RTL515, or any other rear-facing device that uses the Garmin quarter-turn system. It uses the ATOP dial system and easily adapts to a variety of seatpost diameters and geometries. The ATOP system allows you to quickly and easily swap between bikes so you won't need multiple Varia mounts any longer and its rubber adapter pad provides a soft interface that won't scratch or wear on your carbon or aluminum seatpost. The lacing system lets you ride with confidence, knowing that your light is securely dialed in place. Features: Utilizing the ATOP dial system, the Radar Seat Mount quickly and easily adapts with the turn of a dial to fit a variety of seatpost diameters and geometries: 27.2, 30.9, 31.6mm, D cross-section, or aero cross-section. ATOP lacing system and rubber adapter pad provide a soft interface that won't scratch or wear your carbon or aluminum seatpost Specifications: Model: Seatpost Mount Mount: ATOP Dial Color: Black