Garmin Varia RearVue Seatpost Mount Kit Description: The Garmin Varia RearVue Seatpost Mount Kit contains everything needed to mount a Garmin Varia radar or radar equipped tail light to various seatpost shapes and sizes. Whether purchasing this kit to replace a damaged or missing part or simply purchasing an extra mount kit to make swapping your Garmin Varia device to a different bike, this kit will quickly get that device attached to the bicycles seatpost so you can get out for a fun bike ride. Features: Designed to mount a compatible Varia Radar/Tail Light to various seatpost sizes and shapes Includes the parts to fit round seatposts from 25.4mm to 35.0mm in diameter; will fit many Aero and D-Shaped seatposts, though compatibility varies by manufacturer and bike model Installs quickly by selecting the right adapter for the seatpost shape and stretching the right mounting strap around the seatpost before securing the strap to tabs on the mount Includes: Quarter Turn Varia Mount Adapter Shims (Round, Aero, & D-Shaped) Large Mounting Strap Small Mounting Strap Compatibility: Varia RearVue 820 Varia RTL515 Varia RVR315