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Most Intelligent Rear Light

Exposure BoostR + ReAKT & Peloton Mk2

A smart rear light that actively responds to its environment, increasing brightness when braking and being courteous to fellow riders, setting a new standard for interactive safety.

Exposure BoostR + ReAKT & Peloton Mk2 – buy now
4.1(651 reviews)
$110 - $115

via Amazon.com

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Pros
  • +ReAKT technology automatically brightens to 120 lumens upon braking for enhanced safety
  • +Peloton mode dims the light when it senses another rider's headlight behind to prevent dazzling
  • +DayBright pulse mode provides high visibility in daytime conditions with excellent side visibility
Cons
  • The rubber strap mount can detach from the plastic base when not under tension, risking loss
  • The button and charging port cover feel somewhat flimsy compared to the light's premium price
  • Maximum constant output is 80 lumens, which is lower than some competitor 'daylight' models
See how this compares to similar productsFull Comparison →

The Exposure BoostR + ReAKT & Peloton Mk2 elevates the rear light from a passive beacon to an active safety partner. Its core intelligence lies in two systems: ReAKT and Peloton. ReAKT uses an accelerometer to detect deceleration, flaring the light to a bright 120 lumens to alert following traffic that the rider is slowing down, a critical function in low-visibility conditions. Conversely, Peloton mode uses a light sensor to detect the headlight of a cyclist approaching from behind, automatically dimming the BoostR to avoid blinding them—an exceptionally thoughtful feature for group rides. The light itself is brilliantly visible, with a wrap-around lens that provides 270 degrees of illumination. It offers six modes, including a highly effective DayBright pulse, with runtimes ranging from 6 hours on high constant to 48 hours on low flash. Build quality is generally high with a CNC-machined aluminum body, and it now features USB-C charging. The mount, however, is a point of weakness; the thick rubber strap does not securely clip to the mount when not installed, making it easy to misplace. For road cyclists, commuters, and group riders who value smart, context-aware visibility and are willing to invest in cutting-edge rear light technology, the BoostR offers a significant and potentially life-saving advantage over conventional lights.

Last updated:

James CarterSenior Tech Reviewer

James has reviewed consumer electronics and gadgets for over 6 years. He specializes in audio equipment, cameras, and smart home devices.

Product FAQs

Yes, for most buyers. The Exposure BoostR + ReAKT & Peloton Mk2 stands out for: ReAKT technology automatically brightens to 120 lumens upon braking for enhanced safety and Peloton mode dims the light when it senses another rider's headlight behind to prevent dazzling. The main trade-offs are The rubber strap mount can detach from the plastic base when not under tension, risking loss. Check our full Electronics and Gadgets comparison for alternatives.