Hammerhead Karoo 2
From 230.80
Hammerhead Karoo 2
Sigma ROX 12.1 EVO GPS
282.20
Sigma ROX 12.1 EVO GPS
Garmin Edge 1040 Solar
From 531.80
Garmin Edge 1040 Solar

Hammerhead Karoo 2 vs. Sigma ROX 12.1 EVO GPS vs. Garmin Edge 1040 Solar

Hammerhead Karoo 2
Sigma ROX 12.1 EVO GPS
Garmin Edge 1040 Solar
Hammerhead Karoo 2

From 230.80

View product
Sigma ROX 12.1 EVO GPS

282.20

View product
Garmin Edge 1040 Solar

From 531.80

View product

This is what our customers think

Reviews
(20)
(4)
(6)
Pros
Beautiful screen (2x)
Easy and simple to operate
Does what it needs to do
Very easy to read
number of screen adjustment options
user-friendly
attractively priced
data exchange Strava etc
battery (3x)
Solar
Screen size
Large screen
Cons
Sometimes navigation delay
Jumpy re-routing after this navigation delay
Start-up time 46 seconds
For me personally, the screen could be even larger
not yet found
Touchscreen feels plastic
Carrying strap a little too short to fit around the handlebar
During charging you do not see % charged
The jelly case lacks the cutout for crash cord.
not yet
Price
Few to no apps

According to the product specialist

Pros
The high-resolution screen and matte finish, which prevents screen shadow, provide a very sharp image.
The backlight automatically adjusts so you can read the screen clearly in any situation.
The Karoo 2 features turn-by-turn navigation for every route, with audio prompts and visual indicators to make sure you never miss a turn.
The Climbing Challenge feature lets you see in advance which climbs lie ahead with details on length, gradient and duration.
The Hammerhead Karoo 2 can connect to the internet via WiFi, mobile hotspot or a SIM card that can be put into it.
Bright and colourful 3-inch waterproof touchscreen, fully customisable according to your needs!
Equipped with all navigation features, such as loading routes from Strava and Komoot, a Back-to-Start function or simple address entry.
Easy to connect with external sensors, such as a cadence meter, power meter or heart rate belt.
Always safe on the road with the innovative Crash Alert and Home-route function.
Insight into your routes, training data and period statistics via the free SIGMA RIDE app on your phone.
Impressive battery life of 45 hours with demanding usage (or up to 100 hours in battery saver mode).
New multi-band satellite technology gives you the best GPS reception, even when cycling in dense forest areas or in the busy city.
The Edge 1040 Solar gives you insight into your VO2 max, recovery time and training load, and lets you learn how your body responds to training.
The Garmin can be charged during your ride through a solar panel in the display, for up to 42 minutes of battery life per hour during daytime riding.
Cons
The Hammerhead Karoo 2 needs to be recharged after approximately 12 hours of use.
Does not come with heart rate, cadence and speed sensors.
Does not have an accident detection feature.
With heavy use, the battery will not last as long as other bike computers in the same price category.
Despite its good readability, the Edge 1040 is rather large for a bike computer.

Specifications

'Back-to-Start' function
Yes
Yes
Yes
Routeplanning
Plan in the Bike Computer
'Back-to-Start' function
Plan & upload via Smartphone
Plan in the Bike Computer
Plan & upload via PC
'Back-to-Start' function
Plan & upload via Smartphone
Plan in the Bike Computer
Plan & upload via PC
'Back-to-Start' function
Plan & upload via Smartphone
Route Recalculation
Yes
Yes
Yes
Map View
Yes
Yes
Yes
Maps
OpenStreetMap
Expandable Map
Yes
Map Updates
Yes, free
Yes, free
Satellite Signal
GNSS
Galileo
GLONASS
GPS
GNSS
Turn by Turn Navigation
Yes
Yes
Yes
Surprise Me feature
No
Points of Interest
Yes
Yes
Compatible with
Smartphone
Tablet
PC
Display smartphone notifications
Yes
Yes
Yes
Compatible apps
Strava
TrainingPeaks
Hammerhead account
Komoot
RideWithGPS
RouteYou
Today's Plan
Strava
TrainingPeaks
Komoot
Sigma Data Center
Sigma Ride
Garmin Connect
Strava
TrainingPeaks
Komoot
RideWithGPS
Today's Plan
Live Tracking
Yes, via phone
No
Yes, via phone
Strava Live Segments
Yes
Yes
Yes
Sensor Connection
ANT+
Bluetooth Smart
ANT+
Bluetooth Smart
Wi-Fi
ANT+
Speed Sensor
Yes, not included
Yes, not included
Yes, not included
Cadence Sensor
Compatible, not included
Compatible, not included
Compatible, not included
Heart Rate Monitor
Compatible, not included
Compatible, not included
Compatible, not included
Power Meter
Yes
Yes
Yes
Altimeter
Yes, barometric
Yes, barometric
Shimano Di2 compatible
No
Yes
Temperature Display
Yes
Yes
Yes
Screen Size
3.2 inch
3 inch
3.5 inch
Screen Resolution
480x800 Pixels
240x400 Pixels
Backlight
Yes
Yes
Full Colour Display
Yes
Yes
Yes
Touchscreen
Yes
Yes
Yes
Weight
131 grams
110 grams
126 grams
Battery Life
12 hours
14 hours
45 hours
Waterproof Rating
IP67
IP67
Suitable for
Garmin
Wahoo
Training Schedule
Yes
Battery Type
CR2032
CR2032
Warranty
2 years
2 years
Wi-Fi
Yes
Yes
Yes
GPS Sensor
Yes
ANT+
Yes
Yes
Yes
Bluetooth
Yes
Yes
Yes
Mounting materials
1 standard mount
1 standard mount + 1 Out Front Mount
1 standard mount + 1 Out Front Mount
Speed measurement
GPS
Bar Mount Diameter
31.8 mm
Colour
Black
Black
Charging cable
USB-C
USB-C
USB-C
Chest circumference
71 cm - 122 cm
63.5 cm - 132 cm
Suitable for
Road bike (31.8 mm)
Order with
No Accessories
Hammerhead Heart Rate Monitor
No Accessories
Garmin HRM Pro Plus
Heart rate monitor
HideMyBell Handlebar Mount
Speed / Cadence Sensor
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