Hammerhead Karoo 2
Karoo 2 is designed to put your cycling experience first. Powerful features on this GPS bike computer make it simple for cyclists to do structured workouts, follow routes, connect to Strava and other third parties, and get the most out of every ride.
4.7/5 | Based on 557 reviews | Read all
Free Standard Shipping in the UK
Explore Karoo 2’s Best In Class Features
Forge your own path
with route building
Quickly upload routes from 3rd party apps via the Hammerhead web dashboard, or build your own with a couple of taps. Once you've set your route you can quickly add custom points of interest and download it for use on other devices.
See the road ahead with
Cycling-specific navigation designed to help you never miss a turn. But with instant automatic rerouting, we've got you covered if you do.
Keep your eyes on the road
with beeper notifications
Beeper alerts notify you of turns, approaching traffic, training milestones, low battery and smartphone notifications.
Conquer the cols
Our unique CLIMBER feature auto-detects upcoming climbs — even when you're not on pre-planned routes — and provides rich gradient insights so you can strategetically pace your ascent.
See what matters with fully
Choose the data you want to see, and how you want to see it. Profile-based settings make switching between riding styles easier and more powerful than ever.
Optimize your ride with data
We translate in-ride data into beautiful heart rate, power elevation, and gear shifting data visualizations for real-time optimization.
Stay on top of what matters with
Receive notifications for incoming phone calls and text messages, so you don't miss anything important on your ride. Or leave your phone at home. We know sometimes you just want to enjoy your ride; the K2 doesn't require a phone for you to see the road ahead.
Hit your goals with customizable
It's easier than ever to follow your training plan to hit your goals with support for structured workouts, including automatic syncing from TrainingPeaks
Keep on the cutting edge with
frequent software updates
We provide the most agile software on the market, with constant improvements. New features and enhancements keep your riding experience on the cutting edge.
Sync your rides
Upload your rides to connected platforms, for workout analysis and social sharing on the AXS web dashboard.
Minimize drag with a
We know drag is a drag, so we reimagined the standard head unit mount to make it more aerodynamic — while maintaining strength with a large contact surface area.
Save time and space with our
simplified mounting system
We will also be including an adapter that allows you to attach Karoo 2 to a standard quarter-turn mount if you have aero handlebars or other non-compatible bar types.
See Compatible Mounts.
Take full control with
a high-res touchscreen
Our stunning smartphone-quality touchscreen let's you take control with a swipe of your finger, while ignoring rain droplets and mud. Enjoy the K2's eye-popping 17 million color screen, with 2x the pixel density of its closest rival.
Ignore the weather report with
If you can handle it, the Karoo 2 can too: with a water, dust, and mud resistant design, waterproof charging port, USB-C cover, and robust chassis.
What's In The Box?
The Hammerhead Karoo 2
Your brand new Hammerhead Karoo 2: the best head-unit ever built.
Hammerhead Karoo 2 Mount
The most aerodynamic mount on the market: fits on to any set of 31.88mm handlebars, the road standard. 2.5mm Allen key Included. Learn More
This adapter allows you to put the Karoo 2 on any Garmin-compatible bracket, for backward compatibility. See Compatible Mounts.
USB-A to USB-C Charging Cable
Fully charge your device in just over 2 hours with this charging cable.
For extra safety on bumpy roads or in handheld situations.
Quick Start Guide
A starter's guide to get you up and riding in no time. See our New Quick Start Guide for more detailed guidance.
FREE STANDARD SHIPPING
Free Standard Shipping in the UK
45-DAY RISK-FREE TRIAL
Free return and full refund if you don't love your Karoo 2
WE PRIDE OURSELVES ON SUPPORT
Available 7 days a week to ensure you get the most from your Karoo 2
"The best GPS cycling computer you're not using."
"Faster than every other dedicated bike computer."
"The best screen and navigational metrics in the game."
What makes the K2 the best head unit ever built?
Our bike computer has the highest quality screen, most detailed navigation, fastest evolving software, and best connectivity on the market. See how we stack-up.
Hammerhead Karoo 2
Garmin Edge 1040
Wahoo ELMNT Roam V2
Wahoo ELEMNT Bolt V2
Karoo 2 FAQs
As we stripped down the concept of a cycling computer and reimagined what it could do, our focus was always on how it could improve the act of cycling, delivering powerful features that make each and every ride an excellent experience. The result is a device that uses cutting-edge technology to unlock software solutions that enhance every aspect of your ride, from the pre-ride planning, through the in-ride experience, and all the way to post-ride analysis.
With the highest quality screen available on any cycling computer, mapping and navigation that brings new levels of detail and accuracy, constant software updates that keep it leading the pack, and on-board cellular connectivity, the Karoo 2 unlocks a whole new world of cycling.
We have Instructions in 9 Languages:
Here's a PDF of the updated Karoo 2 User Guide:
Karoo 2 - A Quick Start Guide.pdf
The unit measures 100.45 x 60.25 x 19.5mm and weighs 130.8 grams. The Hammerhead mounting system weighs 35.8 grams.
It has the highest resolution for a bike computer screen at 3.2” Inch multi-point capacitive touchscreen.
The total storage capacity is 32 GB and about 3GB is reserved for the operating system and default applications, the rest is there to support your maps and data!
Karoo 2 has a Quad-core 1.1Ghz, CPU with 2GB of RAM. This ultra-fast yet ultra-efficient processor delivers smooth operation and data visualization.
The product has also been tested to ensure that prolonged or intense UV exposure does not discolor or degrade the materials.
The unit has been reliability tested for operation between -15°C and 55°C. We decided to keep the industrial design clean and the options for external power easier. The unit is IP67 Water-resistant and the USB-C Cover provides your Karoo 2 with extra resistance to mud, rain, salt, and more.
Reminder - Do Not charge the unit in wet conditions or if the charging port is full of moisture. See: Charging Karoo 2
To assure your Karoo 2 is backwards compatible, we include a Quarter-turn adapter (fits on all Garmin compatible mounts) as a thank you to each customer.
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