Big Cobber Rear Bike Light

270 Lumens
$89.95

Big Cobber produces an incredible 330° of light, so you’ll be clearly seen from behind as well as from both sides. It’s brilliantly effective at attracting attention day and night, making it one of the safest rear bike lights you could choose. 

Big Cobber produces an incredible 330° of light, so you’ll be clearly seen from behind as well as from both sides. It’s brilliantly effective at attracting attention day and night, making it one of the safest rear bike lights you could choose. 

FREE DELIVERY 
OVER $50
30 DAY 
 RETURNS
2 YEAR 
WARRANTY

18 factories told us Cobber would be impossible. We were happy to prove them wrong. 

  • Incredibly bright 270 lumens
  • Up to 100 hr runtime
  • Incredible 330° beam angle
  • Quick mount release
  • Waterproof to 3 ft with an IP67 rating
  • USB rechargeable, cable-free charging
  • Pre-programmed with 8 light modes
  • Customize modes with Knog's Modemaker app
MODE LUMENS RUNTIME
Max
160 2 hrs
Mid 60
3.5 hrs
Steady Pulse 270 2.5 hrs
Flash 270 6.5 hrs
Rolling Flash 110 5.5 hrs
Side Flash 170 2 hrs
Disco Flash 140 5 hrs
Eco Flash 15 100 hrs

Free shipping within US mainland on orders over $50 and just $6 on orders under $50. We'll ship it asap, and have it delivered within 2 - 4 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 US mainland customers only. If you're shopping from another location, please visit our international store.

Customer Reviews

Based on 3 reviews
67%
(2)
33%
(1)
0%
(0)
0%
(0)
0%
(0)
P
Patrick Anthony McMullin
Very bright,and super groovy!

Excellent rear bike light is this light@Very useful,and bright enough to be seen in day,and night!

Reviewer avatar
Mat Kaczorowski
FANTASTIC LIGHTS AND GREAT CUSTOMER SERVICE

I AM VERY HAPPY THAT A LIGHT OF THIS CALIBRE HAS BEEN MADE - I DO NOT OWN A CAR, AND RIDE AT LEAST 45 MINUTES EACH DAY RAIN, HAIL OR SHINE. I FEEL MUCH SAFER BEING ON THE ROAD, KNOWING THAT MY BIKE LIGHTS ARE LARGE, BRIGHT AND ARE VISIBLE THROUGH A WIDE RANGE OF ANGLES. I LOVE THE ABILITY TO CUSTOMISE YOUR OWN FLASHING STYLES THROUGH AN APPLICATION. WELL WORTH THE PRICE. HAVE DEALT WITH CUSTOMER SERVICE ALSO, AND ARE VERY ATTENTIVE, PROMPT AND FRIENDLY.

R
Roger Cooper
Great light but...

I really like this light. It's bright and visible from the side as well as the rear. It's so bright I think that cars are giving me a little more room but that could be my imagination. Battery life is fine.
There are some flaws though. The biggest is the mount. It's great when new but I take my light off once I arrive at work, (to prevent theft) and put it on again before cycling home. After a few months the connection between the light and the mount is very loose. If I go over a bump the light comes off. I have to look back every few minutes to see if my light is still attached to the bike. I've already lost one and the current one has hit the road at least 20-30 times but I've managed to retrieve it from the road.
I had a battery fail after around a few months and Knog were great. They supplied a replacement pretty quickly.
Another issue is the on/off button. After riding in the rain for several days in a row it becomes incredibly stiff and it is almost impossible to turn the light on. I have been spraying silicon into the switch every month or so to prevent this.
I do like the light though and I'm now on my third. It's rugged as well. If it wasn't for the mount and the switch it would easily rate 5 stars.

'Big Cobber is hands down the best bike light for attracting attention from the rear.'

‘Knog’s Cobber is an impressive light with a simple and elegant design.’

- bikeradar

Why you'll love riding with Big Cobber.

The world's only 330 degree rear bike light.

Simple Button

Big Cobber Rear is simple to operate. A long press of the single button will turn the light on and off, and a short press will cycle through the modes. Cobber has a run time of up 100 hours.

Packed With Innovation

Efficient Chip on Board (COB) LEDs provide maximum brightness level for up to 90% of the battery burn time. As well as 8 pre-programmed modes, it’s compatible with Knog's ModeMaker app so you can customize your light modes.

Mount With Ease

Cobber comes with tool-less removable silicone straps for seat posts 22 – 32mm+ diameter and a magnetic mount. Also includes a standard and Aero mount.

Integrated USB Connector

Plug Big Cobber directly into USB-A ports. When your Cobber is running low on battery, a red ring will light up around the button. This ring will turn green and then turn off once the Cobber is fully charged.

Technical Specifications +-

BULB TYPEChip On Board (COB) LEDs
LIGHT OUTPUT RANGEMax: 270, Eco-Flash: 15
LIGHT MODES8
PROGRAMMABLE WITH MODEMAKERYes
AERO SEAT POST COMPATIBLEYes
LOW BATTERY INDICATORYes
FITS SET POSTS22 – 32mm+ diameter
RUN-TIMEHigh: 100 hrs, Low: 2 hrs
CHARGE TIME5.5 hrs
RECHARGEABLEYes (integrated USB-A connector)
WEIGHT62 g / 2.2 oz
DIMENSIONSH: 22 mm x W: 33 mm x L:93 mm
WATERPROOFYes, IP67 rating
OPERATING TEMP-4 to 122 °F
STRAP MATERIALMedical grade silicone
OPTIMUM CHARGING TEMP
68 to 72 °F (Room Temperature)

Product Run Through +-

User Guides +-

Language Download
Cobber Quick Start - English

Customer Reviews

Based on 3 reviews
67%
(2)
33%
(1)
0%
(0)
0%
(0)
0%
(0)
P
Patrick Anthony McMullin
Very bright,and super groovy!

Excellent rear bike light is this light@Very useful,and bright enough to be seen in day,and night!

Reviewer avatar
Mat Kaczorowski
FANTASTIC LIGHTS AND GREAT CUSTOMER SERVICE

I AM VERY HAPPY THAT A LIGHT OF THIS CALIBRE HAS BEEN MADE - I DO NOT OWN A CAR, AND RIDE AT LEAST 45 MINUTES EACH DAY RAIN, HAIL OR SHINE. I FEEL MUCH SAFER BEING ON THE ROAD, KNOWING THAT MY BIKE LIGHTS ARE LARGE, BRIGHT AND ARE VISIBLE THROUGH A WIDE RANGE OF ANGLES. I LOVE THE ABILITY TO CUSTOMISE YOUR OWN FLASHING STYLES THROUGH AN APPLICATION. WELL WORTH THE PRICE. HAVE DEALT WITH CUSTOMER SERVICE ALSO, AND ARE VERY ATTENTIVE, PROMPT AND FRIENDLY.

R
Roger Cooper
Great light but...

I really like this light. It's bright and visible from the side as well as the rear. It's so bright I think that cars are giving me a little more room but that could be my imagination. Battery life is fine.
There are some flaws though. The biggest is the mount. It's great when new but I take my light off once I arrive at work, (to prevent theft) and put it on again before cycling home. After a few months the connection between the light and the mount is very loose. If I go over a bump the light comes off. I have to look back every few minutes to see if my light is still attached to the bike. I've already lost one and the current one has hit the road at least 20-30 times but I've managed to retrieve it from the road.
I had a battery fail after around a few months and Knog were great. They supplied a replacement pretty quickly.
Another issue is the on/off button. After riding in the rain for several days in a row it becomes incredibly stiff and it is almost impossible to turn the light on. I have been spraying silicon into the switch every month or so to prevent this.
I do like the light though and I'm now on my third. It's rugged as well. If it wasn't for the mount and the switch it would easily rate 5 stars.

Stories
We love seeing our products in action and discovering the many ways in which they enable adventure. Here we showcase these tales.
 Read Here