This kit requires a compatible BUP mount base.The BUP RTL510-515 SL mount arm positions the radar horizontally for clearance below the mount point.
Direct Mount Base for Fizik Saddles with ICs Slot
Standard Bike Rack Mount for Garmin Varia and GoPro
Trek Blendr Bike Seat Saddle Mount for Garmin Varia & GoPro
Mount Arm Kit (Tc) for Garmin Varia Radars (top-center Layout, Includes Tether)
Cestbon Radar Bike Mount for Garmin Varia Rtl510 515 TL300 and Garmin Varia Rearview Radar Tail Light. Saddle Bicycle Mount : Electronics
Tether for Varia RTL 510 - Varia Series - Cycling - Garmin Forums
Seat Post Quarter Turn Mount for Garmin Varia RTL510 RTL515 RVR315 Rearview Bike Radar Tail Light Cycling Bars Seatpost Mounts : Electronics
Seat Post Quarter Turn Mount for Garmin Varia RTL510 RTL515 RVR315 Rearview Bike Radar Tail Light Cycling Bars Seatpost Mounts : Electronics
Review: Garmin Varia RTL515 – 8/10 – Reliable alert system for being overtaken, with a very good rear light
Cestbon Radar Bike Mount for Garmin Varia Rtl510 515 TL300 and Garmin Varia Rearview Radar Tail Light Varia Rear Seatpost Mount : Electronics