Installing the Device

To ensure maximum tail light visibility and radar detection range, you should install the mount according to these considerations.

  • Make sure the device does not interfere with the safe operation of your bike.
  • Install the mount as high as possible on the bike.
  • Mount the device 250 to 1200 mm above the road.
  • Mount the Varia™ RearVue 820 device parallel to the longitudinal axis of the vehicle.
  • Make sure there are no obstructions that may block the tail light or the radar.
  • Make sure the mount surface is perpendicular to the road.

    Device mounted on a bike
  • Make sure the device faces straight back, so that the radar beam covers the maximum range behind your bike.

    Overhead view of radar beam

You should go for a test ride during the day, in a safe environment, and adjust the mount, if necessary, before using the tail light at night.

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February 2026