TraceR 4 ReAKT Rear Light
TraceR 4 ReAKT Rear Light
TraceR 4 ReAKT Rear Light
TraceR 4 ReAKT Rear Light

TraceR 4 ReAKT Rear Light

200 Lumens | 40 Hour Runtime | 38g

SKU:EXPTRACER4RA

  • In stock
  • Inventory on the way
Regular price £75.00 GBP
Regular price Sale price £75.00 GBP
Shipping calculated at checkout.
Description

Most rear bike lights do one thing at one brightness and hope for the best. The TraceR 4 ReAKT pays attention. It flares up when you brake and when the light around you gets brighter, then eases off for the rider sitting on your wheel. All of that comes from a 38g package delivering up to 200 lumens, charged over USB-C in 90 minutes. A CNC-machined aluminium body and IP67 rating mean it shrugs off a British winter. Pair it with the Trace 4 front light and you are properly visible, day or night, at either end of the bike.

In the box:TraceR 4 Reakt , Seatpost Bracket, USB - C Charge Cable.

Compatible brackets

TraceR Saddle Rail Bracket
£10.00
TraceR Aero Seat Post Bracket
£15.00
Stud Bracket for TraceR
£20.00

lets talk tech

Battery Status

A single press of the power button while the light is off displays the battery level for five seconds, providing a quick and convenient way to stay informed and prepared for every ride. This battery status is also displayed when the light is turned off.

Size

Engineered with a sleek, adaptable form factor, it integrates effortlessly into any environment while providing exceptional performance on demand.

Side visibility

Our optically clear 270° Commute Lens enhances side illumination, ensuring you stand out from every angle on the road. Whether you’re navigating dark paths or city streets, this setup delivers maximum visibility, safety, and rider confidence.

Weatherproof

Class leading waterproof ratings mean you will never be let down in any situations, and you can always depend on your light

Weight

Delivers up to 40 hours of runtime from a product weighing only 38 grams with no compromise to strength or durability.

Engineering

Our CNC-machined 6063 aerospace-grade aluminium body is built to withstand the toughest conditions, with a scratch resistant polycarbonate front lens this light is designed to withstand all that you can through at it

Daybright Flash

Our bespoke DayBright pulse pattern is specifically designed for daylight use, making it more conspicuous than a standard pulse and visible over a kilometre away, even in the brightest conditions. With DayBright mode, you’ll be noticed. Be Seen, Be Safe.

USB-C Charging

Offers fast and convenient USB-C charging, allowing you to power up quickly and get back on the road without delays.

Frequently asked questions

ReAKT is Exposure's reactive light technology. It automatically increases the TraceR 4's output in two situations: when you brake, and when the ambient light around you gets brighter.

Braking gives the vehicle behind an instinctive signal that you are slowing. The ambient light response keeps you visible in bright sun and low winter glare, which is exactly when a fixed-output rear light struggles to stand out.

It works on its own, with nothing to press while you are riding.

Peloton mode senses the light of a rider following you and automatically reduces the TraceR 4's output to avoid dazzling them. It is built for club runs, chaingangs and group riding, where a bright rear light is genuinely unpleasant for whoever is on your wheel.

ReAKT and Peloton do not run at the same time, and you can switch either on or off depending on how you are riding that day.

Comfortably, yes. Rear lights work differently to front lights: the job is being seen, not seeing.

200 lumens in DayBright pulse is bright enough to stand out in daylight, while 75 lumens constant suits lit roads after dark. More output is not automatically better on a rear light, which is precisely why Peloton mode exists.

Built to last, serviced to endure

We offer an extra year warranty to all purchases made through our site. This means you will have 3 year warranty on all of our lights and the LED’s inside are covered by a lifetime guarantee! Ensuring peace of mind with every purchase. 

Our lights are designed to last a lifetime, so we carry out servicing and repairs on lights well beyond the warranty period - simply get in touch if you ever need us - we've got you covered!

Customer Reviews

Overall rating: 4.9 / 5 from 528 reviews.

Love both front and rear light. I’m only getting about 10-12 hours per charge though.

Trace + TraceR 4 ReAKT

Love the look and performance of the lights. Perfect for urban cycling. Designed to be seen. Super quick on delivery too. Love them

Trace + TraceR 4 ReAKT

Gift for a friend. Have two of these lights myself. One since 2015 - still works and holds charge (a little down). Second since 2023 and works as new. The new model is even brighter so may buy one as backup to the one from 2015!

TraceR 4 Rear Light

Brilliant lights already own an exposure Diablo

Trace + TraceR 4 ReAKT

Great light with a long battery life. Already had a few comments about how visible it is to those following from behind.

TraceR 4 ReAKT Rear Light

Solid Engineering when you most need it

TraceR 4 Rear Light

Brilliantly bright and brilliantly designed. I have the whole family kitted out with these, they are tough, reliable, and last forever short of losing it. if they go wrong the company will fix them quickly.

TraceR 4 Rear Light

As with all Exposure products, fantastic built quality and reliability.

TraceR 4 Rear Light

I have been using these (and the Exposure head torch) for about twenty years. They are lightweight, have good luminosity and last a full day’s ride. Good to buy British and no need to look elsewhere.

TraceR 4 Rear Light

Works perfectly and for such small lights incredibly bright.The construction is fantastic and I fully expect them to last for years and years.

Trace + TraceR 4 ReAKT

The Trace+ and TracerR ReAKT light set is highly effective. The illumination is surprisingly powerful for such a small product. The build quality and the materials used are excellent. Impeccable.

Trace + TraceR 4 ReAKT

Great light in flashing to be seen or for the early evenings as an intermediate light on constant. The rear is superb also.

Trace 4 Front Light

Great light and very bright for the size

Trace 4 Front Light

Fantastic quality lights, and great service from Exposure. Very happy.

TraceR 4 Rear Light

Quality product, instructions clear, love them!

Trace + TraceR 4 ReAKT

I purchased this rear bike light for my adult son for his birthday. I do not have any photo's but he us extremely happy. He had purchased lights previously but they were not as advertised having false Lumin claims and poor build quality. These by contrast were exactly, came as advertised with excellent build quality and accurate lumin beam.

TraceR 4 Rear Light

Great lights but very little information on how to use them

Trace + TraceR 4 ReAKT

Customer photo review of Trace + TraceR 4 ReAKT

Brighter than the previous model and uses a “C” connector for charging versus the “Mini USB”. Easier connection and faster. A little complicated to program the various modes. I printed a hard copy of the instructions to help me. Increases visibility. I like the helmet mount so I can point the front flashing white light directly at motorists. One more safety item to go along with radar and a helmet mounted mirror. The older I get the less I want to die.

Trace + TraceR 4 ReAKT

This is a little light that performs splendidly. It's easy to operate, with gloves on or off. It's got a seriously long run time at the lower power levels despite it's tiny size and is almost dazzlingly bright at full power. I've not had cause to use the tech settings yet but they should be really useful when necessary. A great piece of kit.

TraceR 4 ReAKT Rear Light

They're simply the next lights. Robust and bright. What more can you want.

Trace + TraceR 4 ReAKT

Been using these for years, hands down the best bike lights. If anything goes wrong they will fix them. I had to buy a new one as I sadly lost one, if you’re less careless than me they’ll last you for years.

TraceR 4 Rear Light

Great light set, neat, compact and solidly built

Trace + TraceR 4 ReAKT

Customer photo review of TraceR 4 Rear Light

Really pleased with the rear light, looks trick, various light modes & bright !!

TraceR 4 Rear Light

Lights amazing. Really bright. Ready for the winter months.

TraceR 4 ReAKT Rear Light

Keeping me seen on my commute. Weighs very little and tucks discretely under my saddle.

TraceR 4 ReAKT Rear Light

Customer photo review of Trace + TraceR 4 ReAKT

Put these on my bike for a long weekend in Mallorca. They lasted on pulse mode across four days of riding without needing a single charge and were light enough not to notice them on the climbs. Great bit of kit for being seen - especially through the occasional tunnel!

Trace + TraceR 4 ReAKT

Great rear light. Only improvement I would make would be to add a safety cord similar to the helmet lights which could be wrapped around the seat post. I use it on my mountain bike so it would take away the worry of losing it on trails.

TraceR 4 Rear Light