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The Fly6 is a rear-facing camera built into a taillight, and it exists for one reason: to record what happens behind you. It loops footage continuously, locks the clip if it detects a crash or sudden tilt, and runs the light and camera together for several hours. For e-bike commuters in traffic it is a kind of insurance, and the footage has settled more than a few disputes. The mount is seatpost-based, so on bikes with a rear rack or a dropper post you need to check clearance. It is not cheap, and the camera quality is fine rather than cinematic.
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Best for: Daily commuters on Class 1–2 e-bikes · Riders who want MIPS without a premium price · Cold-weather riders who like closable vents
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The RCT715 stacks three things: Garmin's rear radar that warns you on a paired head unit or phone when a car approaches from behind, a bright taillight, and a camera that records continuously and saves clips on incidents. The radar alone changes how you ride in suburban traffic because you stop guessing about what is behind you. The penalty for combining everything is weight, price and a battery that lasts a few hours with the camera running. If you do not care about video, the cheaper RTL515 radar light is the better buy.
Best for: Commuters on roads without bike lanes · Riders with a Garmin or phone to show radar alerts · Riders who want incident video
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The Hotrod 50 is a thin strip of bright red LEDs that mounts to a seatpost or seat stay with a rubber strap and charges by USB. Fifty lumens is plenty for a taillight, and the wide strip is visible from the side as well as behind. Several modes include a daytime flash that gets attention even in Texas sun. Runtime in flash mode is long. The strap fits round posts; for e-bikes with a rack that blocks the seatpost, mount it to a seat stay or buy a rack-mount light instead. It is a cheap, reliable improvement over most stock taillights.
Best for: Every commuter · Daytime visibility · Bikes with a free seatpost or stay
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