Hammerhead Karoo 2 GPS BIKE COMPUTER／自行車碼錶

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
Best-In-Class Navigation

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
With CLIMBER

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
Customizable UI

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
Made Beautiful

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
Smartphone Notifications

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
Training Plans

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
For Analysis

Upload your rides to connected platforms, for workout analysis and social sharing on the AXS web dashboard.

HARDWARE

Minimize Drag With A
Low-Profile Mount

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
Outdoor-Proofed Design

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

Quarter-Turn Adapter
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.

Lanyard
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.