Trace MK4 Front & Trace-R MK4 ReAKT Rear
The Exposure Trace MK4 front light and TraceR MK4 ReAKT rear light form a matched pair built from CNC-machined aluminum for everyday commuting and road riding. The front unit reaches 360 lumens while the rear produces up to 200 lumens, giving riders strong visibility from both directions. An IP67 rating keeps the electronics sealed against rain and road spray, and USB-C charging restores a full battery in about 90 minutes.
The TraceR's ReAKT system raises rear brightness automatically under braking or in brighter ambient light, then settles back down for following riders; a bespoke DayBright flash pattern stays visible over a kilometre away in daylight. A single button press shows remaining battery for five seconds, and a 270° Commute Lens widens side visibility. The set includes handlebar and seatpost mounts plus two USB-C cables.
Quick Facts
| Feature | Specification |
|---|---|
| Front light max output | 360 lumens (Trace 4) |
| Rear light max output | 200 lumens (TraceR 4 ReAKT) |
| Water resistance rating | IP67 |
| Charging interface | USB-C, full charge in 90 minutes |
| Claimed weight (combined set) | 70g |
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