Sigma ROX 4.0 cycling computer

Excellent for its price

2026/07/07

Jose Manuel

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If you don´t need potentiometers or complex navigation, it´s enough and more than enough for you. Good battery life

Everything a smart meter needs, in a budget and size

2025/09/09

Alain

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The size and budget of this computer immediately attracted me. Indeed, I was looking for a computer that was not out of price compared to my bike. I needed the classic information (speed, instantaneous, average, distance traveled, elevation) but also GPS guidance to be able to explore the surroundings during medium to long gravel rides. What a pleasure to find something simply effective: 3 buttons, nothing could be simpler, automatic backlighting depending on the brightness, GPS signal detection in a few seconds, pairing and connection to the Sigma Ride app smooth and intuitive... What a joy! I also particularly like the fact that I can send a track to the computer and leave without needing to take the phone, practical if you tackle technical sections and are afraid of breaking it if you fall.Very good weather resistance, it remains to be seen how long it will last but I am confident, 2 hours of output and battery at 94% In short, I am delighted with this purchase and to find Sigma quality here: no fuss, an item designed to perform well and do what is expected of it without being excessively expensive or loaded with unnecessary options or relying on an explosive but fragile design.

Easy to use with customizable display

2025/05/22

Alec

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ROX 4 is easy to use and has all the features I need. I only have three minor comments. The Sigma Ride smartphone app can convert and save Google Maps routes into Sigma tracks for navigation. However, routes do not 100% match the planned routes at preferred turns, but close. Turn-by-turn indications have had delays when trees blocked the GPS signal, but the U-turn indication came up, so I never got lost. When paired with the Sigma Ride app on my iPhone while riding, I like that there are voice notifications like “start, pause, stop” and beeps for incoming calls/messages. But I hope it can include the turn-by-turn voice indication as Google Maps does.

A good device

2024/10/24

José

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Fast and correct shipping. The cycle computer meets the advertised requirements. I hope to use it a lot.

Perfect

2024/08/14

Carles

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Simple, but very comfortable. My 12-year-old son uses it for all his outings and we are delighted. Not a single problem and he has already been on many outings.

Very good

2024/06/24

Kosta

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Good quality. Easy setup. Intuitive to use. Recommended.

Very good

2024/06/05

victor

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Good GPS bike computer

Better than expected

2024/05/13

DC

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It also connected easily with a wrist HR monitor from Garmin and also with a cheap chinese cadence sensor.

Very happy

2024/01/22

ma

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Very good operation. Delighted

Great purchase

2024/01/19

Miguel Angel Romero Burgos

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I was looking for a cycle computer of a certain quality for the bike. It has exceeded all my expectations. I wear glasses and I see it perfectly. I expected it to be a little bigger, but the numbers and the bottom looked good. It has many functions, although perhaps now it would be necessary to configure the heart rate zones. Maybe in a future update of the app. I recommend it 100%.

sigma

2024/01/09

David

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like all products purchased, so far, at bike inn, very satisfied with communication, price and speed of delivery. The name sigma speaks for itself. I recommend

100% satisfied

2024/01/03

Alexandra

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I have carried out 3 runs and I can state that: - pairing with the Selphone (using SIGMA APP) is intuitive, fast and completely customizable - the distance and altitude values recorded during the run were compared with those recorded with another GPS DEVICE (extensively tested) and are absolutely true - I attached the SIGMA ROX 4.0 to the bike using GARMIN mounts and everything works solidly and securely. - 5 hours of use (including the initial pairing with the phone) required 12% of battery (therefore in line with what SIGMA declared) - operation using the 3 buttons is convenient and simple - the SIGMA APP exports the files recorded during the ride in .FIT format, therefore perfectly compatible for loading onto any other APP for sports or tourism use. I am therefore absolutely satisfied with the product, I recommend it without reservations and I compliment the fast shipping and sturdy packaging

Not in use yet

2023/11/08

David Badminton

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I am not using this unit as yet, but I have set it up and tested it. The set up was easy just follow the instructions and it all seemed to work OK. Will know more when I start using next year

Very functional

2023/11/02

Flo

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Very functional GPS counter, you just have to take the fold to send the route with komoot but otherwise great. Don't worry about you not having the GPS signal by turning it on indoors you have to be outside to receive the GPS.

Malfunction

2023/08/16

Carlos Borges

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Good afternoon, Regarding the product supplied by you, I would like to inform you that it is not working correctly. Let me explain: the distance indicated as covered is greater than reality and with the bike stopped it continues to add km. on the next steps. Greetings. Carlos Borges

It works very well.

2023/07/29

Antonio

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It works very well, in the installation it was difficult to edit the screens and the battery charge, when resetting the device it was possible to do it. It is the second that I have on two bikes and for the price it is very good.

Nice bike computer!

2023/07/16

Paul

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I think the product is great. No sensors added and not really tried the navigation yet but already a big step forward from my 7.16 ATS. Very happy with it. Recommended

Sigma rox 4

2023/05/20

David

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Does its job, good screen and easy to install

Very good

2023/03/31

kazu

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Easy to install and looks great. I am satisfied that the battery life is good.

4.5 out of 5 with potential for 6 (top) points

2022/10/22

J.D.

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- POSITIVE: o Out of the box - makes almost everything perfect o Functionality very large & good (best in price class) o Very good readability (+ size) and arrangement of the measured values o Very good lighting & illumination in all lighting conditions (sun incl.) o Very good speedometer in the bracket on&off o Very good measured values without own calibration (only necessary for height) o Intuitive for people who know handheld devices o Sensors are found immediately o Installation/operation without cable&magnet! and easy for skilled hands • Multi-bicycle operation?! o Attachment compatible with other products (e.g. Garmin) o Potential on Super o Many wow effects when unpacking / first use - NEGATIVE: o Improvement desired for installation of bracket and sensors (alignment due to bracket only possible to a limited extent or rubber will tear sooner or later /defect/loss threatens - control necessary!) o Commissioning was difficult (the very first switching on - despite full battery) o No Super 6 points achieved due to mistakes - NEUTRAL: o For IOS (Apple) OS 13 is required - is regrettable for too many devices like this • Use of older mobile phones (approx. 5-6 years) not possible

Functional and easy to use

2022/09/20

Joe

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After downloading and making the appropriate settings for the SIGMA Ride and Komoot app, I was more than satisfied with how easy the SIGMA ROX 4.0 is to use. Above all, I find the design of the pages very practical. The expectations of this bike computer have been fully met.

Impressionnant pour le prix

2022/08/26

Pierre

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Je suis ravi de ce produit. Il est bien assez complet pour mes besoins. L’écran est d’une belle grandeur et facile à lire et à configurer. L'appareillage avec le smartphone et l’ajout des deux apps gratuites est un gros plus. Déjà, une mise à jour intéressante du micro logiciel a été produite par la compagnie. Je recommande l’achat du kit complet avec les trois capteurs et le support.

Excellent product, i recommend

2022/08/14

Danilo

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Another excellent Sigma product with excellent quality. Very good connectivity with the smartphone, I recommend

It connects to the ebike

2022/08/12

Dany

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I wanted to use the tool for a few times before writing a review, overall it works well and is quite intuitive, let's say in the norm for the price range. However, it would be necessary to improve the management of start and stop of the training (phase in which it records the track and data) it happens that sometimes it interrupts it and if you do not notice the display pieces of recording are lost, you find a straight line along the recorded track . Furthermore, it happened to me that after synchronization with the MyRide App, the activity carried out during the day did not appear. Activity regularly recorded within the device, then retrieved manually. In conclusion, a valid tool in relation to the price, the connectivity with different ebikes is much appreciated, keys a little too large, it is easy to press them without wanting to, clear display is always visible, we hope for some firmware update to improve the aspects described above.

Rox4

2022/08/09

Pawel

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A long-lasting, nice counter, it has all the functions that are needed for an amateur adventurer. The battery lasts a long time, the backlight does the job at night.

Cool

2022/07/16

Roberto

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A great device, it works great and with very good information and with a good view. Very good size and shape. With the speed sensor it works perfectly. It connected to the mobile without problem.

Great cycle computer

2022/06/20

Nuno

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GPS very easy to use, clear and accurate. I recommend the purchase.

Opinion on purchase

2022/06/15

warlesom

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great purchase very satisfied with product according to specifications super recommend. fast delivery and the store is excellent.

Great product

2022/05/17

Alex

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Reality great cyclocomputer, keto and with a lot of functions!

Product

2022/05/06

Nivaldo

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Good quality product and I recommend both the product and the store!

Sigma rox 4.0

2022/04/13

Dario

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Good product with excellent value for money. The only flaw is a slight delay in navigator function with Komoot. Recommended product.

Something needs improvement

2022/04/02

Michele

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Delivery was fast and on time. The first pairing between device and smartphone presented some difficulties. Reinstalled the Sigma Ride app the problems were solved. Sigma Ride is functional and pleasant for me to use. Rox 4.0 is light and compact, easy to place on the handlebar. The support is fixed with electrician clamps, practical and economical, but does not allow the possibility of using it on more than one bike. Excellent visibility of the display in all light conditions and the possibility of programming its functions via the Sigma Ride app is useful. The combination with Komoot is effective. I traveled about 400Km with Rox 4.0 but found the navigator function to be mediocre, certainly to be improved. I found a gap of several seconds, if you prefer meters, between the turn indication displayed on Rox 4.0 compared to Komoot or a cartographic map. The delay is quite annoying when dealing with crossroads, roundabouts or navigating in the city. For precise navigation it is necessary to slow down to a crawl near the intersection, or keep the smartphone in sight, making navigation with Rox 4.0 useless. The autonomy is very good, but lower than that declared if the navigation function is activated

Sigma red 4.0

2022/03/23

Roger Ramírez

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Excellent product, the quality of the material is good, the functions they have are necessary for my needs, the price is very good. I recommend it.

Very complete

2022/03/14

Victor

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Used in Orbea Rise m20, it marks the percentage of the battery (very important data in this Ebike), cadence, I associate my band to the pulse, assistance mode, everything I needed for little money.

Sigma ROX 4.0

2022/03/07

Vladimir Mišić

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Very easy to use, clear and accurate gps. I recommend the purchase.

Great cycle computer

2022/02/20

Alessandro

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Excellent cycle computer: excellent data visibility, connects to the e-mtb (shimano ep8 RS), connects to Komoot and shows navigation instructions. Minimalist, but it has absolutely everything!

Sigma 4.0 rox

2022/02/04

Luca

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Excellent cycle computer, arrived in a few days and well packed .... At a very good price

Sigma rox 4.0 and extra support.

2022/02/01

VICTOR

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Good purchase, the product well protected. It took a little longer than originally stated, but as soon as it arrived at the warehouse it was shipped quickly. I only missed a product information telephone number, because I asked how they indicated me in the product description and nobody answered. I will buy again. All the best.

Okay

2022/01/27

Cesar

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Good product and seriousness in this online website, I will continue using it

Sigma rox 4.0

2021/12/08

Stefano

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excellent GPS, not really clear in the operation, however I recommend the purchase

Good product

2021/10/23

Serafin

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I am going to clarify one thing, the cycle computer itself does not need any accessories to measure all the data that are necessary for your bike rides. If you have a pulse meter that connects to the Bluetooth system or another, it will help you and more if it is from the Sigma brand, I have one and it pairs without problem, and everything else, the gps will measure it, geolocate your bike and go. As for the accessories, they are just that, accessories in case you want me to read other parameters more finely. For the rest, as supplied, it serves to give you the necessary information.

Sigma rox 4.0

2021/09/18

Jörg

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Device keeps what it promises, delivery went as advertised and promised!

Assessment

2021/09/14

Lauro Bosi

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Product arrived intact, I haven't tried it yet but I think that like all Sigma products they are excellent

*5

2021/09/13

Helder Moreira

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Very good and fast delivery.

Sigma rox 4.0

2021/09/10

Sigma rox 4.0

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A very good counter for a reasonable price. It has all the most important functions of the counter. Simple to use, well made. This is my fourth Sigma counter. I was not disappointed. I would highly recommend.

Comment

2021/09/10

Nivaldo

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the product suits my use and the delivery was perfect!

Sigma rox 4.0

2021/09/04

Jessica

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Hello, at the moment I have used it only a couple of times and everything is fine, everything perfect. Good product.

Great device

2021/09/03

Alex

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Arrived quickly, just turned on easy initial setup. Used only once per hour, it has detected a much lower altitude than the Sports-Tracker app used at the same time on the smartphone, it seems to me that the slope updates much earlier downhill than uphill but I expect to be able to use it better after a few more exit, I will also try the integration with Komoot as soon as possible, while I find some difficulties in the interface with the app. all things considered, I would say that for just over 60 euros it is an excellent device, small, light, easy to read and place, I ordered 3 more handlebar mounts to rotate it on my bikes.

Great combination of navi & bike computer

2021/08/31

Deian Koutzarov

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For me personally, a great combination of navigation and bike computer, because I wanted to replace my dependency on the cell phone when I don't have to. The NAVI function has to be optimized under Views so that the street name and the remaining distance to the change of direction are displayed. Find the height measurement - & profile very successful. All in one - RECOMMENDED!

Sigma rox 4.0

2021/08/19

Saul

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All perfect. Excellent synchronization with GPS. It's perfect for everything ...

Order sigma rox 4.0

2021/08/12

Massimo

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Everything is OK. The article did not arrive soon as it was not available immediately but the rest is ok. Fully satisfied. Well packed package, if I need it I will definitely make other purchases. Also regarding a question I asked them, they answered me immediately.