Big Cobber Rear Bike Light

270 Lumens
$89.95 USD

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
  • Compatible with standard & aero seat posts
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 to Continental USA 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 Continental USA customers only. If you're shopping from another location, please visit our international store.

Customer Reviews

Based on 29 reviews
90%
(26)
10%
(3)
0%
(0)
0%
(0)
0%
(0)
H
Hal Cantwell
Good Grief this Light is Bright!

Bright, Versatile, Excellent quality and Just what the new road bike needed. The standard + extra flash patterns at various brightness’s means this light will make you unmissable no matter the situation and will last as long as you do.
Day or night there is a setup that is perfect.
Ease of operation, mounting and charging is another plus. Then that they are lightweight and aerodynamic is a plus plus.

Z
Zeron
Great Light

Nice build quality, the light shines brighter than a Sith Lords Lightsaber. Nice integrated usb charging for ease without cables.

M
Maugan Rimmer
Excellent light, Buy one, be Bright

This is an all round superbly designed and sturdy product, all the lumens you need and great visibility from the rear and side. The charge lasts for ages. Essential for rider visibility when winter riding in the dark but it also works well in daytime conditions too. Attaches easily to the seatpost. My only minor gripe is that out of the box it can be a tad difficult to detach the light from the part that attaches to the bike frame, which you need to do to access the USB charger. This does get easier over time with repeated use and technique though. The included USB extender cable is really useful when charging using a laptop/ PC.

C
Chuc
Amazing brightness for alerting anyone behind you without being garish

Some lights just make it hard to see anything and they annoy people - this one is super bright but not "in your face" bright. Love the size and the unmistakable alert it gives out.

F
Fabrice
Top

Excellent !

'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.

Product Video +-

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)

User Guides +-

Language Download
Cobber Quick Start - English

Customer Reviews

Based on 29 reviews
90%
(26)
10%
(3)
0%
(0)
0%
(0)
0%
(0)
H
Hal Cantwell
Good Grief this Light is Bright!

Bright, Versatile, Excellent quality and Just what the new road bike needed. The standard + extra flash patterns at various brightness’s means this light will make you unmissable no matter the situation and will last as long as you do.
Day or night there is a setup that is perfect.
Ease of operation, mounting and charging is another plus. Then that they are lightweight and aerodynamic is a plus plus.

Z
Zeron
Great Light

Nice build quality, the light shines brighter than a Sith Lords Lightsaber. Nice integrated usb charging for ease without cables.

M
Maugan Rimmer
Excellent light, Buy one, be Bright

This is an all round superbly designed and sturdy product, all the lumens you need and great visibility from the rear and side. The charge lasts for ages. Essential for rider visibility when winter riding in the dark but it also works well in daytime conditions too. Attaches easily to the seatpost. My only minor gripe is that out of the box it can be a tad difficult to detach the light from the part that attaches to the bike frame, which you need to do to access the USB charger. This does get easier over time with repeated use and technique though. The included USB extender cable is really useful when charging using a laptop/ PC.

C
Chuc
Amazing brightness for alerting anyone behind you without being garish

Some lights just make it hard to see anything and they annoy people - this one is super bright but not "in your face" bright. Love the size and the unmistakable alert it gives out.

F
Fabrice
Top

Excellent !

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