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Lezyne has announced the Radar Pro 300, a compact rear radar light priced at $179.99. The company lists a 2,000 mAh replaceable battery, up to 24 hours of runtime in radar-only mode, an automatic brake-light feature and a new quarter-turn mount. Detection range and runtime are manufacturer claims, not independently verified test results.
Lezyne has announced the Radar Pro 300, a rear bicycle light with vehicle-detection radar, an automatic brake-light feature and a new quarter-turn mount. The company lists the unit at $179.99, the same price as the Radar Drive Rear before that model’s planned price reduction, giving riders another option for receiving alerts about approaching traffic.
The Radar Pro 300 is a smaller, lighter design than Lezyne’s Radar Drive Rear, according to the product information reported by Bikerumor. Lezyne lists a 300-lumen daytime flash mode, seven output modes and visibility across 270 degrees. Its radar is claimed to detect vehicles approaching from as far as 150 meters. That range is a manufacturer specification; the supplied report does not include independent testing.
A built-in braking feature is designed to sense when the rider slows and increase light output, in either steady or flashing modes. Lezyne also says flashing can activate when a vehicle is detected. The light connects to compatible cycling computers through Bluetooth or ANT+, and to the Radar Ally smartphone app, which offers visual and audio alerts and lets users adjust light modes and alerts. It can also pair with Lezyne’s React Drive Front Light for visual radar notifications without a cycling computer.
The listed 2,000 mAh battery provides up to 24 hours of use in radar-only mode or up to 20 hours in flash mode, according to Lezyne. The battery is designed to be replaceable, and the light has an IPX7 waterproof rating and a USB-C charging port. Lezyne gives the light-only weight as 94 grams; the light, mount and O-ring weigh from 108.2 grams, depending on mount size. The included mount fits round seatposts and comes with adapters for aero and D-shaped posts.
A Second Rear Radar Option
The Pro 300 combines several features that can affect a buyer’s choice: claimed longer battery life, an automatic brake-light response and a mount intended to make removal and installation quicker. Its app and computer connections also give riders more than one way to receive alerts, though the usefulness of those options depends on compatible devices and rider preferences.
Pricing is part of the comparison. Bikerumor reported the Pro 300 at $179.99 and said Lezyne planned to lower the Radar Drive Rear to $149.99. If that reduction takes effect as described, shoppers will be choosing between the newer model’s listed features and a lower-priced existing option. The source does not provide a full side-by-side test or establish how either device performs in varied traffic and weather conditions.
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How It Fits Lezyne’s Radar Line
The Radar Pro 300 joins Lezyne’s Radar React System and is presented as a more compact counterpart to the Radar Drive Rear. Rear radar lights detect approaching vehicles and send alerts to a display or another connected device; they supplement, rather than replace, ordinary awareness and safe riding practices.
Lezyne’s system offers several alert routes. Riders with a compatible cycling computer can receive radar notifications there, while the Radar Ally app provides phone-based visual and audio alerts. Pairing with the React Drive Front Light adds a handlebar-level visual notification option. The lights can be bought separately or as a pair, according to the report.
The mount is another change from the earlier model: the Pro 300 uses a quarter-turn interface and includes adapters for seatpost shapes beyond round tubes. The product listing also identifies a replaceable battery design under EU battery regulations. The source does not state how the battery is replaced, whether replacement parts are available in every market or what they will cost.
““Max 24hr runtime””
— Lezyne, in product specifications reported by Bikerumor
Testing and Availability Details
The supplied report does not give a retail release date, confirm which markets will receive the light first or provide a hands-on performance assessment. Lezyne’s 150-meter detection range and maximum battery runtimes remain product claims here; no test conditions, traffic scenarios or independent measurements are provided.
It is also unclear how reliably the automatic brake-light function distinguishes genuine slowing from other changes in movement, and whether its response can be adjusted beyond the app’s stated light and alert controls. The source does not specify the replacement battery’s service process or cost, or confirm the timing of the Radar Drive Rear’s reported price cut.
Retail Launch and Real-World Tests
Lezyne’s next practical milestone is retail availability, including confirmation of launch timing and pricing in individual markets. Buyers comparing the two rear radar models can also watch for confirmation that the Radar Drive Rear price falls to the reported $149.99.
After the light reaches riders, independent testing could establish how its claimed detection range and battery life hold up under real riding conditions, and how the automatic brake response behaves on the road. Until those details are available, the specifications should be treated as Lezyne’s stated figures rather than verified performance results.
Key Questions
How much does the Lezyne Radar Pro 300 cost?
Bikerumor reports a listed price of $179.99. The source says the Radar Drive Rear is expected to receive a price reduction to $149.99, but does not provide the timing of that change.
How long does the Radar Pro 300 battery last?
Lezyne lists up to 24 hours in radar-only mode and up to 20 hours in flash mode. Those are manufacturer figures; the supplied report does not describe independent battery testing.
Does the Radar Pro 300 work without a cycling computer?
It can connect to the Radar Ally smartphone app for visual and audio alerts. It can also pair with Lezyne’s React Drive Front Light for visual radar notifications without a head unit.
What seatposts does the included mount fit?
The mount is designed for round seatposts and includes adapters for aero and D-shaped posts. Lezyne also lists compatibility with most quarter-turn mounts.
How far away can the radar detect vehicles?
Lezyne claims detection of approaching vehicles from up to 150 meters. The source material does not include independent testing of that range.
Source: bikerumor.com
