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ROX 4.0 Bike Computer incl. Stem Bracket black

ID: 1431552

- 33 %
RRP £77.99
VAT included. plus Delivery cost
    • black
    • white
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Product description

SIGMA SPORT ROX 4.0 Bike Computer incl. Stem Bracket black (black)

This product’s description has been automatically translated. Please excuse any mistakes.

ROX 4.0 - GPS bike computer with altitude measurement
The ROX 4.0 GPS bike computer supports cyclists with its 30 functions and its user-friendliness on the bike tour, so that they can concentrate on the essentials: The fun of cycling. The extra large display reliably shows data such as altitude profile, speed, distance and training time. Navigation instructions and the coupling to the e-bike and external sensors are a matter of course for the ROX 4.0 Bike Computer. Thanks to the free SIGMA RIDE app, the current ride data can be tracked and analysed at any time via the SIGMA RIDE app on your smartphone.

Outstanding display
The high-contrast display is very easy to read, even while riding, thanks to its 2.4 inch diagonal and extra-large digits. A special Red Circle at the top right of the display has a coloured background and offers cyclists an innovative and exciting display of their training data. In combination with the free SIGMA RIDE app for the smartphone, individual display views can be set with just a few clicks - up to six screens with three values each can be configured. Current speed and time are permanently shown on the display.

Ready to go at any time
The ROX 4.0 bike computer can be positioned directly on the handlebars in just a few steps - without any cables or sensors. If you wish, you can couple the Rox 4.0 with additional sensors to measure speed, heart rate and cadence. After switching on, the ROX 4.0 determines the position of the cyclist within seconds using GPS and GLONASS. In combination with the intuitive three-button operation, the bike tour can start immediately.

Barometric altitude measurement
A real highlight of the ROX 4.0 is the integrated barometric pressure sensor. With the help of this barometric measurement, it reliably provides bikers with information about the altitude, determines inclines and declines and thus enables a precise recording of the route. A graphic altitude profile can also be called up on the ROX 4.0. The starting altitude at the beginning of the tour can be calibrated automatically via GPS or can be set manually if desired.

Easy navigation
The ROX 4.0 bike computer can be connected to the komoot app on your smartphone. The komoot app then sends turn-by-turn directions to the ROX 4.0, so you can simply leave your smartphone in your pocket during the bike tour. The turn-by-turn directions can be shown as an arrow on the display or within the so-called Red Circle. The coloured circle on the display also counts down the distance to the next turn by means of coloured bars. The bars decrease the closer the cyclist gets to the turn. The number of metres to the next turn is also displayed next to the circle.

External sensors
If you want to get even more data or an even higher accuracy of your values, you can also couple external sensors such as speed, heart and cadence sensors to the ROX 4.0 thanks to ANT+ and BLE and have all data in view if you wish.

E-bike ready
The ROX 4.0 is e-bike ready and can be easily paired with many e-bikes. The GPS bike computer connects to the compatible e-bike system and shows the current support level, battery status, light and other data on the display or in the Red Circle.

Convenient data evaluation
With the SIGMA RIDE app, training data is transferred via BLE from the ROX 4.0 to the smartphone and collected. The most important data and statistics can be clearly displayed with coloured data fields, read on the smartphone at any time and conveniently evaluated.

Flexible mounting
The ROX 4.0 is delivered with the conventional GPS handlebar mount. This disc is mounted with cable ties either on the handlebar or stem of the bike and the ROX 4.0 is fixed by screwing it in with a click.
The Overclamp Butler is available in the HR and SENSOR set as well as an accessory. It enables perfect alignment of the ROX 4.0 bike computer even with short stems. The computer head can be positioned centrally above the stem at the height of the handlebar. The butler fits handlebars with a diameter of 31.8 to 35 mm.


  • Holder Compatibility: GPS Mount, Overclamp Butler
  • Memory up to 100h training
  • Waterproof: IPX7
  • Connectivity: BLE, ANT+


MTB Beginner / Tour, Marathon / Cross Country, All Mountain / Enduro, All-round / Beginner, Tour / Cross Country, Marathon / XC, All Mountain / Trail, Enduro, Road, Cyclocross, Gravel, Endurance, Trekking, Bike Travel, Cross, Every Day / Commuting, Lifestyle / Urban Biking, Everyday Cycling, Lifestyle / Single Speed, Urban Sports, Commuting
Main Information
Unit Type:
Handset without map display
Size (W x H x D):
44,9 x 73,6 x 18,4
51 g
Color display
Displays Diagonally:
2.4 inches
Lighting function
GPS functions
Driving statistics
Distance Km:
Total Km
Speed Sensor Function:
Max speed
Speed Sensor Function:
Average speed
Speed Sensor Function:
Actual speed
Time Function:
Number of training functions:
Altimeter Function:
Actual altitude
Altimeter Function:
Gradient in%
Altimeter Function:
Altimeter Function:
Gradient - current
Cadence function:
average pedaling rate
Cadence function:
max. cadence
other functions:
Actual temperature
other functions:
Total calorie consumption
other functions:
Smart alerts
Including altimeter:
Energy Saving
Battery Type:
Lithium-ion battery
Power Source:
Battery pack
Working Life:
25 hours
Scope of Delivery
Stem holder
Model Year
Article number

Customer opinions

26 Customer Ratings
1 Star
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5 Stars
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SIGMA SPORT ROX 4.0 Bike Computer incl. Stem Bracket white white
Great bike computer
Translated from the German To the original
One of the few bike computers that are really great. Connecting to the app was super easy, menu navigation is simple and you can see everything important at a glance. It's also really great that you can navigate with the bike computer via Komoot. Top product
SIGMA SPORT ROX 4.0 Bike Computer incl. Stem Bracket black black
Top bike computer
Translated from the German To the original
Start via app super easy. Connection fast and stable. Operation is intuitive and therefore easy to learn, even the first time. Highly recommended, especially because of the extensive functions. Buying tip!
SIGMA SPORT ROX 4.0 Bike Computer incl. Stem Bracket black black
Ideal for my purposes
Translated from the German To the original
I made a conscious decision to use the Sigma Rox 4.0 over the Sigma Rox 2.0 because of the range of functions, the larger display and larger battery. I have not regretted this decision, the GPS signal is found reliably after 1-2 minutes and the bike computer is ready to use from that moment. There is always a distance difference of about 5% between my smartwatch and the bike computer with GPS tracking. No idea which device works here exactly. But that difference is perfectly fine with me. All in all, I am absolutely satisfied with the handling and the range of functions.