Knog Blinder Mob Four Eyes rear light review

We put Knog's rear commuter light through its paces

Cycling Weekly Verdict

The Knog Blinder Mob Four Eyes rear light offers good brightness for excellent visibility, and a good mounting system that will fit aero seatposts.

Reasons to buy
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    Will fit aero seatposts

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    Numerous modes

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    Impressive battery life

Reasons to avoid
  • -

    USB plug picks up grit

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Knog lights have long been held in high regard for by commuters, and it’s easy to see why with the simple and effective Knog Blinder Mob Four Eyes rear light.

>>> Buyer's guide to rear bike lights

While its big brother, the Knog Blinder R70 rear light, is aimed at out-and-out roadies training at night on pitch black lanes, the Knog Blinder Mob Four Eyes rear light is aimed more at commuters riding under street lights, and in this situation it does a great job.

With a brightness of 44 lumens, there are certainly brighter rear lights on the market, and yet the Knog Blinder Mob Four Eyes rear light is still more than bright enough to stand out when riding in the city, even against a background of red brake lights and traffic lights. In fact Knog says that it can be seen from up to 1.2km away.

>>> Tips for cycling and training in the dark

There are five different modes to choose from (two constant, two flashing, and one strobe) which should have you covered in all riding situations. Cleverly, the light also remembers which mode you were in when you last turned it off, and will start in that mode next time you turn it on.

Watch: buyer's guide to bike lights

The only thing I wasn’t entirely sure about was the exposed USB charger. This forms part of the mounting mechanism, meaning that it is exposed to the elements.

Knog says that the charger is waterproof and won’t be damaged by exposure, which in my experience seems to be the case. However, what I’m not so keen on is that the plug is likely to pick up mud and grit from the road, which will then be transferred to the innards of my laptop when charging. The solution, perhaps, is to use the supplied USB extension cable, which also makes it easier to plug into USB ports.

>>> Best bike lights under £100: a complete buyer's guide

Much better is the fact that the Knog Blinder Mob Four Eyes rear light is supplied with three different sizes of strap, meaning that it will easily fit all but the very deepest of aero seatposts.

I was also impressed by the battery life. Obviously this depends on what mode you have the light on,so it will only last for two hours if you choose to have it on the highest constant mode, but if you stick to the Eco Flash mode (which I would still feel very safe using in all situations) then it will last for up to 66 hours, which is probably enough for at least six weeks of riding for most people

For more information visit the Silverfish website.

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Henry Robertshaw began his time at Cycling Weekly working with the tech team, writing reviews, buying guides and appearing in videos advising on how to dress for the seasons. He later moved over to the news team, where his work focused on the professional peloton as well as legislation and provision for cycling. He's since moved his career in a new direction, with a role at the Department for Environment, Food and Rural Affairs.