Hammerhead Karoo GPS Cycling Computer
Clear Navigation. Powerful Training Tools. Seamless Bike Integration.
The Hammerhead Karoo is a premium GPS cycling computer designed for riders who want accurate navigation, detailed ride data and straightforward control. Its bright 3.2-inch touchscreen is easy to read, while physical buttons keep the device usable in rain, with gloves or across rough terrain.
Multi-band GNSS improves location accuracy, detailed global mapping supports road, gravel and mountain bike routing, and extensive ANT+ and Bluetooth connectivity allows the Karoo to work with a broad range of cycling sensors, e-bikes and SRAM AXS components.
Clear, Responsive Touchscreen
The 3.2-inch display uses a sharp 480 × 800 resolution to present maps, ride data and workout information clearly.
The touchscreen provides quick access to menus and map controls, while physical buttons allow the Karoo to be operated when touch control is less practical.
Accurate Multi-Band Navigation
Multi-band L1 and L5 GNSS helps improve positioning accuracy in areas where conventional GPS can struggle, including tree cover, built-up environments and steep terrain.
Support for GPS, GLONASS, Galileo, QZSS and BeiDou gives the Karoo access to multiple satellite networks for dependable ride tracking and navigation.
Mapping for Road, Gravel and Trails
Detailed global maps provide surface-aware routing for road, gravel and mountain biking.
Routes can be synced from connected accounts, while on-device navigation provides clear directions and mapping information for planned rides and spontaneous exploration.
Fast Everyday Performance
A 2.0GHz quad-core processor, 4GB of RAM and 64GB of internal storage give the Karoo the power to load maps, move between screens and process ride data smoothly.
The generous storage capacity provides space for mapping and ride information without requiring frequent management.
SRAM AXS Integration
The Karoo offers close integration with SRAM AXS components, allowing compatible drivetrain and system information to be displayed directly on the computer.
This gives riders useful access to gear selection, battery status and other supported AXS data without adding separate displays to the bike.
Extensive Sensor Connectivity
ANT+ and Bluetooth connectivity allow the Karoo to pair with compatible heart-rate monitors, power meters, cadence sensors, speed sensors, lights and other cycling equipment.
This makes it suitable for riders wanting basic navigation as well as those building a detailed training and performance setup.
Useful E-Bike Information
Compatible e-bikes can share information including battery level, assistance mode, motor output and estimated range.
Having this information alongside navigation and ride data makes the Karoo particularly useful for longer e-bike rides and unfamiliar routes.
All-Day Battery with Fast Charging
The Karoo provides more than 15 hours of battery life, making it suitable for long training rides, events and full-day adventures.
USB-C fast charging can restore approximately 30% capacity in 30 minutes, with a full charge taking around 2.5 hours.
Built for Changing Conditions
An IP67 water-resistance rating helps protect the Karoo against rain, spray and demanding riding conditions.
At approximately 118g, it combines its large display and robust construction without adding excessive weight to the handlebar.
Key Features
• Bright 3.2-inch colour touchscreen
• Physical control buttons for use with gloves or in wet conditions
• Multi-band L1 and L5 GNSS positioning
• Supports GPS, GLONASS, Galileo, QZSS and BeiDou
• Detailed global mapping
• Surface-aware routing for road, gravel and mountain biking
• Instant route syncing from connected accounts
• Structured workout support
• ANT+ and Bluetooth connectivity
• Compatible with cycling sensors and supported smart lights
• SRAM AXS integration
• Compatible e-bike data support
• 2.0GHz quad-core processor
• 4GB of RAM and 64GB of storage
• More than 15 hours of battery life
• USB-C fast charging
• IP67 water resistance
• Integrated barometric altimeter and motion sensors
• Approximate weight: 118g
Why Riders Love the Hammerhead Karoo
• Large, easy-to-read display
• Touchscreen and button control options
• Accurate navigation across varied terrain
• Detailed mapping for road, gravel and mountain biking
• Smooth and responsive interface
• Excellent integration with SRAM AXS components
• Broad sensor compatibility
• Useful information from compatible e-bikes
• Fast route syncing and structured workout support
• Battery life suitable for long rides
Who Is the Hammerhead Karoo For?
The Karoo is designed for cyclists who want high-quality navigation and detailed performance information in one easy-to-use device.
It’s particularly well suited to riders using SRAM AXS equipment, cyclists exploring unfamiliar roads or trails, structured-training users and e-bike riders who want supported system information visible on the handlebars.
Perfect For
✔ Road cycling
✔ Gravel riding
✔ Mountain biking
✔ E-bike riding
✔ Structured training
✔ Racing and performance tracking
✔ Long-distance rides
✔ Route exploration and navigation
✔ Riders using SRAM AXS components
Our Thoughts on the Hammerhead Karoo
The Karoo is the computer we’d recommend to riders who place screen quality and navigation near the top of their list. Maps are clear, the interface is straightforward and having both touch and button controls makes it practical across different bikes and riding conditions.
Its SRAM AXS integration is a real advantage if your bike already uses compatible components. The large display is also helpful for riders following unfamiliar routes or wanting several data fields visible without making everything too small.
Battery life is competitive for everyday and all-day use, although riders planning multi-day trips will still need access to charging. If you want a responsive cycling computer with excellent mapping and particularly strong SRAM integration, the Karoo is a very good option.
Why Buy from Chain Reaction
✔ Expert GPS computer and sensor compatibility advice
✔ Help connecting compatible power meters, heart-rate monitors and e-bikes
✔ Assistance with SRAM AXS integration
✔ Professional installation and setup available
✔ Finance options available
✔ Nationwide New Zealand delivery
✔ Ongoing support from our Christchurch team
Specifications
• Display: 3.2-inch colour touchscreen
• Resolution: 480 × 800 pixels
• Controls: Touchscreen and physical buttons
• Processor: Quad-core 2.0GHz
• Memory: 4GB RAM
• Storage: 64GB
• Satellite systems: GPS, GLONASS, Galileo, QZSS and BeiDou
• GNSS bands: L1 and L5
• Connectivity: ANT+ and Bluetooth
• Battery life: More than 15 hours
• Charging connection: USB-C
• Fast charging: Approximately 30% in 30 minutes
• Full charging time: Approximately 2.5 hours
• Water resistance: IP67
• Weight: Approximately 118g
• Integrated sensors: Barometric altimeter, gyroscope, magnetometer, accelerometer, ambient-light sensor and temperature sensor
• Mapping: Global maps with road, gravel and mountain bike routing
• Training: Structured workout support
• Component integration: SRAM AXS
• E-bike support: Battery, assistance, range and output data from compatible systems
