Bosch Nyon: switch from mph to km/h (or km/h to mph)
Units are in the Nyon's system settings; on the BUI350 the eBike Flow app setting is pushed to the display too. One minute.
Step by step
- Switch the Nyon on.
- Go to Settings (gear icon) > 'System settings'.
- Tap 'Units' and choose Metric (km/h) or Imperial (mph). Speed, distance, range and navigation distances follow.
- BUI350: also check eBike Flow > Settings > Units so the app does not push mph back.
- BUI275: eBike Connect has its own unit setting under your profile.
Tip: Change it in the app as well as on the display; otherwise the app can silently reset it on the next connection.
Can't find it?
If 'Units' is missing from System settings on a BUI275, update the Nyon over Wi-Fi (Settings > Wi-Fi, then Updates). Units do not change the 25 km/h assistance cut-off.
Frequently asked
Does Imperial affect the 25 km/h cut-off?
No; display only.
Why did my Nyon switch back to mph?
The paired app's unit setting was pushed to the display; change it in the app too.
Is navigation also in miles?
Yes, all distances follow the unit setting.
Manuals and video
- Bosch eBike Help Center: official error-code index
- Bosch eBike downloads: quick start guides and battery guide
- Bosch eBike dealer search (DiagnosticTool readout)
Other Bosch Nyon guides
Bosch Nyon: change the display language (BUI350 and BUI275)Bosch Nyon: set the time (usually automatic)Bosch Nyon: reset the trip distance and ride statisticsBosch Nyon: wheel circumference (dealer-set)Bosch Nyon: change assist modes and customise them (BUI350)Bosch Nyon: activate and use eBike LockBosch Nyon: set the display brightness and night modeBosch Nyon: pair with eBike Flow (BUI350) or eBike Connect (BUI275)Bosch Nyon: update the firmware (Flow, Wi-Fi or dealer)Bosch Nyon: enable and use walk assistBosch Nyon: turn the lights on and off, automatic and always-on lights
Still stuck? Take a photo of the display and show it to a local e-bike workshop. Bring the bike's system name (e.g. Bosch Performance Line CX) and the exact code; that saves diagnostic time and money.