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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.

129 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 27 reviews
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.

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.


Excellent !

howard jamner
bike light

Big Cobber Rear Bike Light by Knog is the very best bike light out there

Ronny Smith
Not perfect yet….

Light seems very good from early use. I would agree with one review I saw, and it stop me from giving 5 stars. It is too hard to attach the light to it’s mount when the mount is on the seat tube, so you end up having to take the mount off the bike to slide the light on the mount, then you have to put the mounted light back on the bike. And, having to do so, I question how will the skimpy silicon straps that hold the mount to the seat post will last. All in all, light seems great, but the mount could use some big improvements.