garmin radar bike

One unit specifies detection up to 153 yards (140 meters) for vehicles approaching from behind. The other description emphasizes precise tracking but does not provide a numeric detection distance.

One unit uses a compact vertical design that mounts easily to most road bikes. The other mounts directly to the seatpost and is compatible with a seat rail mount kit for attachment to the saddle rails.

Battery life varies by model and mode: one unit reports up to 8 hours, while the tail light/radar model lists up to 24 hours in day-flash mode and up to 30 hours in radar-only mode.

They include a bright tail light visible from up to 2 km (1.24 miles) and multiple light patterns (day flash, night flash, solid, peloton). One model also offers a brake-light pattern that signals when you’re slowing or stopping.

They provide tone and vibration alerts on a paired smartphone, plus audible and visual alerts and visual threat-size indicators on compatible bike computers or in the app.

Dimensions and weights vary by model. Example listings include 72 × 49 × 24 mm at 48 g, and another listing of 1 × 3.9 × 1.7 inches at 0.2 lb.

Both units list plastic in their construction. One listing also specifies metal in addition to plastic.

They report same-speed tracking to keep you alerted to vehicles following at the same speed or attempting to pass; descriptions note tracking can be limited or unavailable at slower speeds or when the radar is obstructed.