Big Cobber Rear Bike Light

270 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.

$44.98
$89.95 USD
Save 50%

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 AVAILABLE
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

    Good Design Award Gold Winner
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

Need Knog delivered by December 24th? Order by Tuesday 17th December, 2024.

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 - 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.

Customer Reviews

Based on 96 reviews
78%
(75)
11%
(11)
1%
(1)
1%
(1)
8%
(8)
A
Alexandra Nagel
Bright but unwieldy

The back light is extremely bright - that is awesome! But the installation at the saddle rod is quite tricky! Also if the weather is quite muddy , the little power-button gets stucked because of grain of sand in the gap.

J
JIM EANES
Big Cobber Rear Light is the Best

What I like about the Rear Cobber is the construction, the ease of attaching to bike and the ease of recharging. All are important. This is on top of a rear light that is sure to be seen, anytime of the day. That is what a bicycle light is all about.

R
Robert Ryan
Nice light-

This light is very bright and I like that. The light mount is not my favorite. Could have a better way to secure it to the bike

M
Matthew Wickens

Battery dies super fast. Light also keeps cutting out even when fully charged.

A
Amanda Prosser
Knog rear light

Very tight near impossible to put on and keeps turning off by itself even fully charged

123
'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 96 reviews
78%
(75)
11%
(11)
1%
(1)
1%
(1)
8%
(8)
A
Alexandra Nagel
Bright but unwieldy

The back light is extremely bright - that is awesome! But the installation at the saddle rod is quite tricky! Also if the weather is quite muddy , the little power-button gets stucked because of grain of sand in the gap.

J
JIM EANES
Big Cobber Rear Light is the Best

What I like about the Rear Cobber is the construction, the ease of attaching to bike and the ease of recharging. All are important. This is on top of a rear light that is sure to be seen, anytime of the day. That is what a bicycle light is all about.

R
Robert Ryan
Nice light-

This light is very bright and I like that. The light mount is not my favorite. Could have a better way to secure it to the bike

M
Matthew Wickens

Battery dies super fast. Light also keeps cutting out even when fully charged.

A
Amanda Prosser
Knog rear light

Very tight near impossible to put on and keeps turning off by itself even fully charged

123