Review on 🚴 LICHIFIT Bike Saddle Support Seat-Post Mount Tail Light Holder for Garmin Varia Rearview Radar/RTL510 by Billy Ivy

This is a well made metal mount that fits the bike's seat rails. It's strong and stable, secured with built-in clamp and screws. You can adjust the tension so that the rails are not damaged. I wasn't happy with the rubber band mounts that Garmin supplied. The straps can snap and the mount rotates with the Varia mount. Not so with this seat post. I also recommend getting a 45mm GoTough metal extension (link below) so the Varia can extend past the edge of the seat so you still have a bag under the saddle. Incidentally, you also need a 14mm 5.8-1 metric screw for the extension, which you can buy at any hardware store.