Knog Blinder Square and V Bolt rear light review - more flashing LEDs than a school electronics project

A smart and compact rear light with easy fitting, convenient charging and more fancy flashing than you thought possible

Image shows Knog's Blinder Square and V Bolt rear light's mounted to a bike.
(Image credit: Rachel Sokal)
Cycling Weekly Verdict

The Knog Blinder rear lights are bright, neat and tidy. The mass array of different light patterns and flashing programmes makes the Blinders a fun and quirky option, even if they don't offer much of practical use. More usefully, they come with an excellent mounting system which is easy to use and holds nice and tight, and a direct USB-A connector for cable-free charging.

Reasons to buy
  • +

    Squares! Lightening! Lots of flishy-flashing!

  • +

    Compact and neat

  • +

    Easy fitting

Reasons to avoid
  • -

    On / off button a bit hidden

  • -

    Indicator light a little too discrete

  • -

    Too many programmes makes tracking run time tricky

  • -

    Need to change fitting band for different sized posts

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

The Knog Blinder rear lights have a sense that someone has thought about both the form and function. Just like some of the other newer rear lights, these use Chip On Board (COB) LEDs to keep the weight low and brightness high.  

We tested the standard Blinder Square rear light alongside the longer V Bolt version. They’re neat, compact and have a sense of quality as well as hosting a myriad of different flash patterns in funky shapes. Is this enough for the Blinders to stand up to the rest of the best bike lights competition?

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