Hammerhead Karoo 2 review: A worthy pretender to the throne

Smartphone-like touchscreen with market-leading maps, but let down a little by its battery life

A Hammerhead Karoo 2 computer mounted to the front of a bike, with the training screen showing
(Image: © Aaron Borrill)

Cyclingnews Verdict

With the best screen and navigational metrics in the game, the Hammerhead Karoo 2 brings a premium experience to a broader audience


  • +

    Unrivalled touchscreen responsiveness

  • +

    Impressive screen clarity

  • +

    Stellar navigational prompts

  • +

    Weight more in line with rivals


  • -

    10-hour battery is well beaten by its rivals

You can trust Cyclingnews Our experts spend countless hours testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

We reviewed the Hammerhead Karoo 1 cycling computer back in 2019 and came away feeling impressed by what it offered users in terms of a holistic cycling computer experience. As one of our recommendations in our best cycling computers buyer's guide, it hit all the markers when it came to its high-definition screen, intuitive functionality, advanced mapping and GPS capabilities but was ultimately let down by the market's propensity for smaller, slimmer units.

It appears as though the company took all criticisms to heart and has redefined the concept altogether with its latest offering. According to the brand, the Hammerhead Karoo 2 is the 'most powerful cycling computer on the market'. The new model is lighter, smaller, and more premium-looking than its predecessor but it's also jam-packed with an impressive feature set and class-leading screen resolution. 

Thank you for reading 5 articles in the past 30 days*

Join now for unlimited access

Enjoy your first month for just £1 / $1 / €1

*Read any 5 articles for free in each 30-day period, this automatically resets

After your trial you will be billed £4.99 $7.99 €5.99 per month, cancel anytime. Or sign up for one year for just £49 $79 €59

Join now for unlimited access

Try your first month for just £1 / $1 / €1