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Big Cobber

Big Cobber Rear

AUD $134.99

This product in currently out of stock


Big Cobber rear produces an incredible 330° of light, so you’ll be clearly seen from all angles.

It’s brilliantly effective at attracting attention day and night, so if you’re after the safest commuter bike light around then look no further.

8 in stock


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Simple Button

Simple Button Knog Knog

Big Cobber is super 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. The Big Cobber has a run time of up 120 hours.

Super Bright

Super Bright Knog Knog

Packing 270 lumens, Big Cobber is seriously bright. Efficient Chip on Board (COB) LEDs provide maximum brightness level for up to 90% of the battery burn time. Big Cobber comes pre-programmed with 8 modes, plus it’s compatible with the ModeMaker app so you can customise your light modes.

Mount with Ease

Mount with Ease Knog Knog

Cobber comes with a tool-less removable silicone straps for bars and seat posts 22 – 32mm+ diameter and a magnetic mount. A large strap is also provided that will fit tubes and head tube profiles with a circumference of up to 200mm. Cobber comes with a standard and Aero mount.

Integrated USB Plug

Integrated USB Plug Knog Knog

No charging cable is required for your Cobber, its integrated USB plugs directly into USB ports. It has a charge time of 5.5 hours. 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 and ready to go.

18 factories told us this light would be impossible

18 factories told us this light would be impossible

We were happy to prove them wrong.

  • Specifications
  • Instructions


H: 22mm x W: 33mm x L:93mm


62 grams

Charge Time

5.5 hours



  • Modes Lumens Runtime
  • Max 160 2
  • Mid 60 3.5
  • Steady Pulse 270 2.5
  • Flash 270 6.5
  • Rolling Flash 110 5.5
  • Side Flash 170 2
  • Disco Flash 140 5
  • Eco Flash 15 100


Watch the instructional video or download the user guide below.

Cobber Quick Start Guide

Customer Reviews

Based on 78 reviews
John Underwood
The best or nothing

Top quality highly functional great fitting, bright tail light. Love Knog. For me it is Knog or nothing.

Christian Rotter

Big Cobber Rear Bike Light

Norman Hayes
Red Light

Works according to the ads. I’m very happy with it.

Mola Bergese
So sad, I lost it

As soon as I received it, I turned it on and went on my bike to try out! The light is super bright, all I was looking for! Next day went exploring with my husband in the woods and had to ride with the mtb on couples miles on the road before hitting the trails. So I put the light on so the cars can sees us. Once in the trail I forgot to take it off. We were exploring off trails and when we finally got back to the gravel road I checked my lights and it fell somewhere. I was sad. Because it’s not a trail that you follow I couldn’t go back to retrieve it. I’ll get a new one for sure, but I’ll
Wait for some discounts.

Mary Hayes
Very Bright, but definitely not waterproof

When this light worked, I loved it. However, less than two years in, water collected inside the light and it no longer turns on. Whenever I squeeze it, water comes out of the corners. I don't ride in heavy rains, but it's ridiculous that something that's meant to be used outside and is advertised as waterproof fails in this way. I received this as a gift, so there's no way for me to do a warranty return. I haven't heard anything from the manufacturer, and I do not think I'd purchase this myself.