01 April 2017 ~ 11 Comments

Sigma ROX 11.0 GPS Cycling Computer Review

ROX 11

For several seasons I have used the German-designed Sigma ROX 10.0 GPS bike computer. I have been happy with it, excepting one big complaint: I could never remotely upload the results of an activity, except through a desktop or laptop computer. I don’t own a laptop so uploading my rides while traveling was always a problem. So now, with the Sigma ROX 11.0, this problem is supposedly solved, as it has Bluetooth and they have provided an app for smartphones which “talks” to this new unit.


SDC = Sigma Data Center app on a PC or an iMac desktop computer.
SL = Sigma Link app for mobile devices such as an iPhone.
ROX = The actual bike computer.


I like that I can totally customize up to six screens with up to six fields per screen. And this is done quickly on a desktop computer and uploaded to the unit. These preferences can be saved to my computer at home. Before purchasing this unit, I was also looking at the Lezyne Super GPS, which is currently their top-of-line unit and is comparably priced. It only has up to four fields per screen.

The handlebar mount, unlike the ROX 10, is the same as the high-end Garmin’s, so I can use the many accessories available for the 11.0. It locks in better than the 10.0 too.

This unit is compatible with all ANT+ heart rate monitor chest straps. They also offer a new chest strap that also offers a both ANT+ and a Bluetooth signal. The Bluetooth signal for this chest strap is only used for some Sigma fitness watches and is not needed for the ROX 11. However, I have successfully used the Bluetooth feature to sync to a heart rate variability app called Elite HRV.

My Gripes, Thus Far (as of June 2017)

  1. Navigation screen: While the screens are very customizable, there is one that isn’t. They have placed into the unit a default navigation “bread crumb map” screen which shows up automatically when the unit is in navigation mode, whether you like it or not. I have asked the US tech support crew and they don’t know how to remove or modify this screen. I would prefer to remove the text fields on top so the whole screen is a map. In January 2018 I wrote the Germany headquarters about this and their response was “We are so sorry but at the moment it is not possible. What I can do is to get your idea to our developers, and they will consider it in the next updates.”
ROX 11 Nav

This default screen comes up when one is in navigation mode, but the fields cannot be edited like other screens.

2. The Duration Time, as displayed on the ROX 11 during an activity, is inaccurate, especially if one turns the device off to save battery life (or to make the average speed seem higher). After uploading results to the Sigma Data Center on a PC, the accurate “Duration Time” displays, but not while you are riding. Consequently, I have changed that setting on my Sport Profile so the Auto Pause is now enabled (see photos down a ways).

Duration time displayed on the ROX doesn’t match the “real” duration time after uploading (when auto pause is disabled).

3. I have had very bad luck uploading results onto an iPhone 6 when I only had cellular reception. I almost always needed a WiFi connection to make this happen. The iPhone and the ROX11 simply didn’t want to talk to each other via Bluetooth. Frustrating.
4. Another minor problem is then using the ANT+ heart rate chest strap on longer rides it will unsync. This almost always happens when I stop for a lunch break and and step away from my bike so the GPS is out of range of the ANT+ (2.4 GHz) signal. When I return it is no longer synced. The solution is simple though, before I clip again, simply turn the ROX 11 off and then restart it, resuming the prior activity.

To upload to an iPhone (& also to Strava) remotely w/o Wi-Fi (with WiFi seemed a whole lot easier, but even this hit and miss)

Be sure to change these settings on an iPhone…

  • iPhone > Settings > Cellular (data usage) > Sigma Link > On
  • iPhone > Sigma Link > App Settings > Mobile Network > Autosync > On (green)
  • iPhone > Sigma Link > Sigma Cloud > Syncro only with Wi-Fi > Off (red). You may have to synchronize it get the data saved into Sigma Link after each activity.
  1. iPhone Bluetooth > ROX 11 GPS > Forget this device (if it is enabled)
  2. iPhone WiFi > Disable
  3. ROX 11 > Settings > Connect Smartphone > Forget this phone (IF possible, sometimes it doesn’t show as synced)
  4. Sigma Link app on phone > App-Settings > Sharing Accounts > Strava > enable Auto Sharing. Be sure the correct User account is at the bottom and that it matches what you are using on your PC Sigma Data Center.
  5. ROX 11 > Bluetooth Sync Data > Sync or Connect Smartphone
  6. Sigma Link app on phone > Download Activities (w/o enabling Bluetooth on phone first)


  • Sigma Link app > My Devices > “ROX GPS 11.0” should display on top w/ Firmware #; if not then hit “+” to add it. Do this before attempting to download activities, otherwise it may spin endlessly looking for the device.
  • SL > Activities > Click on the box to the left of the activity, name it & reclassify the activity (optional) > Press the lower right (forward) button to save data onto phone and/or cloud.
  • SL > Activities > Click on Edit (pencil in LR corner) > Select white box next to activity > Share link next of activity > Enable Strava button so it is green, not red. Do NOT click on activity & then attempt to share.

My Profile Settings (under SDC > My Devices > ROX 11 > Sport Profile > Road Bike. Backed up as a .ssp file.)

Why Sigma instead of Garmin?

When I got my first Sigma, the ROX 10, it had more features than a Garmin at the same price point. This ​Sigma had the ability to follow a breadcrumb route whereas the Garmin (500 or 520) only recorded it. This feature may now be available on some mid-priced Garmin models, but I haven’t really checked.

Also, many Garmin models seemed unstable and would lock up or crash from time to time; people would lose their route which they were attempting to follow or lose the entire recording of their ride. I never had those issues with either Sigma. But, on a 2017 1000K brevet, my Sigma ROX 11 recorded my ride OK, but afterwards would not upload my results. It apparently had too much data. I did many similarly long rides using the ROX 10 and that was never an issue. I have since then swapped it for a new unit (under warranty) so hopefully that was an isolated case.

Other Notes

To save or delete an activity: Press Stop, pause, press Stop again & wait for “Finish Training” & floppy disk icon should show, then press stop a third time to save.

To delete it, press Stop, pause, & then Stop again (disk icon should show). Press the “+” button until the garbage can shows and then press the Stop button.

To get the ROX to show up on a desktop computer, using the Sigma Data Center, plug into computer, turn on the ROX & then launch the ap on a PC….or unplug & replug the connection at the computer end side of things. The name of your ROX should display in green just under My Devices on the lower left corner.

To get customized training fields, create a new Sport Profile in SDC on a PC. My Devices > RWS 11.0 (or whatever you named it) > Sport Profile. The Sigma help page website doesn’t show this. This is the “Favorites” as found on the ROX 10.

When uploading a Track to the ROX and not using SDC, try getting the ROX so it displays “Sync Mode – Connected.” Turn ROX off and on to get this to happen.

Firmware updates: After doing a firmware update or if starting with a replacement ROX 11: Back up data. SDC > Green highlighted device > Toolbox (round crankcase symbol) > Follow the commands > Turn off the ROX and turn it back on and continue. (May need to go to Settings > Firmware update on ROX).
Afterwards, be sure to (I have these first two files save on my iMac hard drive):

  1. Upload Sport Profile (.ssp) file. This has all the custom fields in it that display on the ROX 11.
  2. Upload Device Configs (.ssf) file. This is the profile with the general settings.
  3. Readjust zoom (used with navigation map) setting: Hold down “+” button in training mode, i.e. short menu > Zoom > Track Zoom = .2 mile
  4. Readjust the altitude zoom: Hold down “+” button in training mode, i.e. short menu > Alt. Zoom = 1kmi (or other options that include 500mi, 5kmi, 2kmi or 1kmi).
  5. Re-pair heart-rate chest strap. Settings > Connect Sensor > Select Sensor > Heart Rate > Search Sensor.
  6. Re-pair Smart phone.

Pedaling Time field on ROX only works with cadence feature.

SDC > Dashboard > Remaining log time > Delete (removes activities on device) — FREEZES. Or on the ROX > Memory > Activities

The Auto Off Time under device settings only works when the ROX is not actively recording an activity, even though you or the bike may not be moving.

11 Responses to “Sigma ROX 11.0 GPS Cycling Computer Review”

  1. Mark 13 April 2017 at 1:41 pm Permalink

    Thank you for posting this, ridiculous they don’t tell you how to edit the training view screens!

  2. Ken 2 January 2018 at 10:13 pm Permalink

    Thanks for this review, lots of good options out there! I think the first GPS company to open source their firmware will quickly become the best product because their users would be able to customize and fix any issues they have.

  3. Joaquín Emilio Ortiz Jurado 21 July 2018 at 8:17 am Permalink

    I’m having troubles with this device. It doesn’t show me the real information when training. Ex: while riding, it shows me my speed is 8 or 7 kms/h, and my app tells me 27 kms./h; what is thru. It happens the same with the distance, no measure the real distance. Would someone help me to solve this?.I followed all the steps to set it up, even I changed the batteries…but nothing.Thanks.

  4. Rando Richard 22 July 2018 at 3:33 pm Permalink

    When you say “my app tells me 27 kms/h” what are you referring to? I use the Sigma Data Center app on my desktop computer (an iMac) which I do not use until after I am done riding. I would first update the firmware on the ROX. If that doesn’t do the trick, then call Sigma. In the USA it is 1-888-744-6277.

  5. FILIPPOS PAPADOPOULOS 9 February 2019 at 4:18 am Permalink

    how can you upload a track to the rox without the use of sdc?

  6. Rando Richard 10 February 2019 at 7:11 pm Permalink

    I am not aware of a method. Sorry.

  7. Lukasz Przechodzen 25 February 2019 at 3:57 pm Permalink

    @Filippos There’s some little trick. You can upload the track to GPSies service. And than find it on Your smartphone in Sigma Link app.

  8. Rando Richard 25 February 2019 at 4:07 pm Permalink

    Nice tip. I don’t use GPSies service. What is it anyway? With my ROX 12 I can upload routes to Strava for use in uploading when not near a PC.

  9. Michael Felix 1 June 2019 at 7:02 am Permalink

    Thank you so much for finally solving my problem of editing/personalising screens. The manual really is rubish as already mentioned before. You should have writen it. Thanks again! Michael

  10. VS22 18 July 2019 at 12:12 pm Permalink

    Hi, i jusr purchased a Sigma Rox 11 GPS. At the second time that i used, i faced the first problem. I opened it after my outing to download the data. Opened the welcome screen and doesn’t go further. It doesn’t even close! What should i do please?

  11. Rando Richard 19 July 2019 at 7:57 am Permalink

    I guess try a “reboot” as per this blog.