Cobber Reflex Rear Bike Light

250 Lumens

Lumens are a measure of the total amount of visible light from a light source. The higher the lumen rating the “brighter” the light will appear.

$79.99 USD

Cobber Reflex Rear is engineered to adapt to the ride. Using intelligent Reflex modes, it adjusts to your bike’s speed and angle, maximising visibility when it matters most. Smart, sharp and unapologetically bright.

Cobber Reflex Rear is engineered to adapt to the ride. Using intelligent Reflex modes, it adjusts to your bike’s speed and angle, maximising visibility when it matters most. Smart, sharp and unapologetically bright.

FREE DELIVERY AVAILABLE
30 DAY RETURNS
2 YEAR WARRANTY
  • Adaptive Reflex technology that responds to changing speed, bike lean and surface conditions
  • 250 lumens of high-impact rear visibility
  • Up to 70 hours runtime on ECO and 8 hours on HYPE
  • Massive 330° beam arc for visibility across lanes
  • Pre-programmed with 4 steady & flashing modes
  • Customisable modes via ModeMaker 2.0 (Web-USB)
  • Automatic On/Off Functionality
  • USB-C rechargeable (cable not included)
  • 100% waterproof with IP67 rating
  • Robust, integrated quick-release mount
  • Compatible with standard & aero seatposts
  • Intelligent button LEDs display battery & charge status
MODE LUMENS RUNTIME
HIGH 75 2.5 HR
LOW 20 8 HR
HYPE
 250 8 HR
ECO 20 70 HR
  • Cobber Reflex Rear Light
  • Knog Clasp
  • Small, Medium and Large silicone straps for the ideal fit ( fits bars 22-32mm+)

Free shipping to Continental USA on orders over $65 and just $8 on orders under $65. We'll ship it asap, and have it delivered within 2 - 5 business days.

Returns & Exchanges

We stand behind everything we make and want you to be happy. If for any reason you're not satisfied with your purchase, return it within 30-days for a full refund. We'll even pay the shipping. For more information, please see our Returns & Warranty page.  

Shipping on Knog's US website is available to Continental USA customers only. If you're shopping from another location, please visit our international store.

REFLEX MODE
TILT
Light Pattern responds to the tilting of your bike - strobing in the corresponding direction.
REFLEX MODE
BRAKE
Light intensity will spike when the cobber detects your bike decelerating.

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

COBBER REFLEX /

REACTS TO THE WORLD AROUND YOU /

'Made to stand out from every direction'

Reacts to the world around you

With Adaptive Reflex Technology

ADAPTIVE REFLEX TECHNOLOGY

Built to adapt to the world around you, Cobber Reflex uses intelligent modes that respond to your speed and bike angle, automatically adjusting output to keep you visible on unpredictable roads.

CUSTOMISE & RECHARGE VIA USB-C

USB-C compatible (cable not included) for fast charging, plus advanced customisation of light modes and patterns using Knog’s ModeMaker 2.0 Web-USB software.

QUICK RELEASE MOUNT

Integrated Quick Release Mount for improved flexibility and durability resulting in a stronger, more secure hold across a greater range of frames and seat posts.

INTELLIGENT ON/OFF

Intelligent On/Off functionality senses movement and automatically powers the light up or down as needed optimising battery life.

Technical Specifications +-

BULB TYPEChip On Board (COB) LEDs
BATTERY3.7V 800 mAH
LIGHT OUTPUT RANGEMax: 250, Eco-Flash: 15
LIGHT MODES8
PROGRAMMABLE WITH MODEMAKERYes
AERO SEAT POST COMPATIBLEYes
LOW BATTERY INDICATORYes
FITS POSTS & BARS
22 – 32mm+ diameter
RUN-TIMEHigh: 100 hrs, Low: 2 hrs
CHARGE TIME4 hrs
RECHARGEABLEYes USB-C Rechargeable (Cable not included)
WEIGHT39 g / 1.4 oz
DIMENSIONSH: 28mm x W: 43mm x L:62mm
WATERPROOFYes, IP67 rating
OPERATING TEMP-20 to 50 °C / -4 to 122 °F
STRAP MATERIALMedical grade silicone
OPTIMUM CHARGING TEMP
20 to 22 °C / 68 to 72 °F (Room Temperature)

User Guides +-

Language Download
Cobber Reflex Rear Bike Light - Quick Start Guide - English

Customers praised the impressive brightness and visibility, with "very bright" settings that are effective. However, concerns about battery endurance for long rides and the rubber strap attachment were common. The strap "falls off easily" and customers worry about losing it. Design and functionality received positive feedback overall.

  • Very bright and great settings!
  • Brightness is impressive and various options are both fun and functional as well as effective.
  • Bright light, I like the design
  • 5 stars: 6 (50%)
  • 4 stars: 2 (17%)
  • 3 stars: 1 (8%)
  • 2 stars: 1 (8%)
  • 1 star: 2 (17%)
G
Gavin Truong
Unreliable

Pretty below average for any regular bike rider. Light lasts less than 2 hours which is nowhere near long enough for any sort of weekend ride and not to mention i’ve had two of these stop working on me now. First one was replaced after it stopped charging and second one died weeks after of the same problem both times I ensured the rubber cover was seated properly to prevent water ingress. Would not recommend.

Hi Gavin, We're sorry to hear about the issues you've experienced with the Cobber Reflex Rear Bike Light. We appreciate your feedback here - if you are not already, please continue to communicate this issue with our customer service team as this would not be a common occurrence and we would certainly like to investigate further, and ensure that you've got a working light!

M
Michael Frogley
Smart design, bright, simple and USB-C.

One thing I was keen on was replaceable rubber bands, which these lights do have. Other designs have integrated rubber straps, which when break really mean replacing the whole light.

G
Ghost Rider
Not For Big Miles

It's bright. It's visible. But it lacks endurance. I would pick something else if you're looking for a light that holds a charge for a couple of road rides.

R
Rudolf Scheicher
disappointed

On earlier models, the rubber strap used to attach the light to the bike was secured on one side. On the current model, the strap keeps falling off the light. Not very useful.
The 2-hour runtime isn't enough for a bike ride.

S
Solonas Kyprianou
WOW

Amazing how good quality this light is and the brightness and aesthetically beautiful.

E
Eliam Coro
Needs cleaner attachment to bike

Bright light, I like the design, but the way you attach it to the bike is terrible constantly losing that little rubber strap.

Also, I find it flashing constantly and it doesn’t really work in a peloton the way it was intended good idea, though!

A
Alek Hoskins
Cobber reflex rear light

Absolutely love it. Bright, individual, customisable. What’s not to like!

G
Gerhard Hüttner
Thank you Kong!

… best rear light in the world!

S
SIMON NELDNER
Knog always delivers

Since the Blinder bike lights (esp rear) came out 10+ years ago, I have been a big fan of the Knog products, and the latest Cobber Reflex is no exception. I really like the extra illumination area, easy to install, accessible lighting modes, usb-c charging - time will tell on battery life and durability - but ok for now.

S
Steve Finley
Great tailight!!!

Been using the Cobbler Reflex taillight and am very pleased. Very bright and great settings!

D
David J Ciske
Cobber

Really like the light. Brightness is impressive and various options are both fun and functional as well as effective. The only downside is the rubber strap that attaches the light to the seat post. Since it is freely removable, it falls off easily and I am certainly going to lose it at some point point. I wish half of it stayed permanently attached to the light

D
Deborah Cook
Side visible rear light

Bright multi mode rear light also visible to side. Only downside was USB-C charger not included.