Lezyne Radar React System: Radar Tail Light and Front Alert (£199.99)

The Lezyne Radar React System pairs a radar tail light with a front light that shows and sounds an alert when a vehicle approaches from behind. We have not tested it. This page collects what Tredz lists and the current price.

Available now: Lezyne Radar React System — £199.99 at Tredz (listed RRP £260), correct at time of writing, 12 October 2026.

Check price on Tredz

What the retailer lists

In the set: the Radar Drive tail light (300 lumens) and the React Drive front light (up to 1,200 lumens).
Alerts: vehicle detection through the Lezyne Radar Ally smartphone app, selected compatible GPS bike computers, or directly on the React Drive front light, which has rear-facing LED indicators and an audible alert.
Pairing: a smartphone is needed for the first pairing; after that the front light works without one.
Control: both lights can be controlled from the Radar app, and the listing says the system is cross-compatible with select ANT+ head units.
Build: IPX7 waterproofing and USB-C charging on both lights.

Where it fits for triathletes

The points below are our reading of the listed specs, not test results.

No head unit needed. The alert is on the front light, so it works on a bike with no computer, such as a turbo-and-commute bike or a borrowed one.
Lights as a pair. At £199.99 you are buying front and rear lighting as well as the radar, which is the comparison to make against a stand-alone radar unit.
Compatibility. Lezyne lists “select” ANT+ head units, so check your bike computer is on its list before relying on alerts there.

Where to buy

Tredz lists the Lezyne Radar React System at £199.99 at time of writing, and the link below goes to the same product page.

Check price on Tredz

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