Stromer FAQ | N - Z

See FAQ - ‚Owner Change/Register Used Stromer | Forgot/Missing PIN | New Stromer Customer Account | Problems‘

See OMNI / DISPLAY V1, V1.1 - 'Sensors / speed levels / engine tuning'

Stromer OMNI C

Carry out the following steps when you first take your Stromer to the OMNI App would like to add:

1. Make sure that your Stromer bike has reception.
2. Open the OMNI app on your smartphone and click on "Add Stromer".
3. Call up the menu on the bike display, select "BIKE" and then "OMNI".
4. Click on "NEW CODE".
5. Now use the OMNI app to scan the QR code shown on the bike display.
   If the QR code is not recognized by your smartphone, you can enter the displayed numerical code manually instead.

If you already have a Stromer in your OMNI app and want to add another bike, proceed as follows:

1. Call up the profile page in the Stromer OMNI app.
2. Scroll down to "Add another Stromer".
3. Now follow the same process as above.

How to video by Stromer (EN)

Stromer OMNI BT

If you have purchased a Stromer with the OMNI BT app, your dealer will need the e-mail address of your Stromer account, the VIN number of the bike and your personal details.

If you do not yet have a Stromer account, you can register with a Stromer dealer create an account or download the Stromer OMNI app and create an account yourself.

How to video by Stromer (EN)

Sometimes the pictogram of the Stromer model is missing on the start page of the OMNI app.

You can try the following:

• 1. log out of the OMNI app and log in again
• 2. new OMNI app from Google Play Store or Apple Store install
• 3. contact your dealer

See PROBLEMS - Omni - 'Omni app shows the wrong location!

See OMNI - '2G/3G switch-off / 4G upgrade...'

See OMNI / DISPLAY V1, V1.1 - ‚Installation / Removal‘

Electronic components can be exchanged 1:1 within the respective model without the involvement of the dealer or myStromer AG.

The OMNI is an exception. It is registered in the Stromer database with a unique VIN (chassis number). If the Omni is replaced, it must be re-registered in the portal. This can only be done by a Stromer dealer or myStromer AG.

See OMNI / DISPLAY V1, V1.1 - 'Omni - Flowchart'

See OMNI / DISPLAY V1, V1.1 - 'Red and black bars, what do they mean?

Yes, but you also need an adapter cable set (item no. 401613), approx. 49 €

See OMNI / DISPLAY V1, V1.1 - 'Omni symbols'

See PIMP mySTROMER Care / cleaning of the Stromer

See PIMP mySTROMER - 'Care / cleaning of the Stromer'

General

Die Kommunikationswege beim OMNI C (Color) und OMNI B (Bluetooth) unterscheiden sich fundamental. Die Omni C korrespondieren mit dem Stromer Backend über eine Mobilfunkverbindung (2G/3G/4G). Beim OMNI BT passiert das über die installierte und gekoppelte OMNI BT App ausschliesslich per Bluetooth. Daraus ergeben sich verschiedene Lösungsansätze bei den Themen:

• Change PIN
• PIN vergessen, verloren
• PIN Eingabe falsch, wird nicht akzeptiert

Bedingungen:

• Ein vorhandenes Stromerkonto bei dem man sich erfolgreich anmelden kann
• Eine gute Mobilefunkverbindung beim Omni C
• Eine funktionierende Bluetoothverbindung beim Omni B

See – FAQ – ,Registrierung – neues Stromer-Kundenkonto‘

Change PIN

Omni C (und Omni App)
Modelle: ST1, ST1 X, ST2, ST2 S, ST3, ST5, ST7

per OMNI: Drücke so lange auf das Symbol «SPERREN», bis du aufgefordert wirst deinen aktuellen PIN einzugeben. Anschliessend kannst du einen neuen PIN festlegen.

per OMNI App: Gehe zum Menü «Konfiguration» (2-tes Symbol unten v.l.) > «PIN ändern». Nach Eingabe des neuen PIN’s – und Bestätigung desselben – wird dieser automatisch an den Stromer, sowie per SMS an deine bei Stromer registrierte Mobiltelefonnummer, gesendet.

See auch Stromer FAQ oder das „How to“ – Video

The PIN can only be generated if the Stromer is switched on and has good mobile phone reception.

Omni B (und Omni BT App)
Modelle: Alle ST1-Modelle ab 2019 kommunizieren über die OMNI BT-App und Bluetooth (Source).

per OMNI: dito Omni C, oben

per OMNI BT App: Gehe zum Menü «Konfiguration» (2-tes Symbol unten v.l.) > «PIN ändern». Nach Eingabe des neuen PIN’s und Bestätigung desselben wird dieser über Bluetooth an den Stromer gesendet.

Der PIN kann nur generiert werden, wenn der Stromer eingeschaltet ist und eine Bluetooth- Verbindung über die Omni BT App zum Stromer besteht.

Bei ST1-Modellen ab Oktober 2021 (mit Daylight) kann die Konnektivität von der Eigentümerin oder vom Eigentümer über OMNI BT aktiviert werden – für Funktionen wie GPS-Ortung, Smartlock, Crash Alert und mehr. Bei älteren Modellen (2019 – 2021) ist hierfür eine Umrüstung durch einen Fachhändler erforderlich. (Source)

PIN vergessen, verloren, falsch (wird nicht akzeptiert), OMNI BT App gelöscht

Omni C (und Omni App)

per OMNI: keine Option (Lösung siehe OMNI App)

per OMNI App: Gehe zum Menü «Konfiguration» (2-tes Symbol unten v.l.) > «PIN ändern». Nach Eingabe des neuen PIN’s – und Bestätigung desselben – wird dieser automatisch an den Stromer, sowie per SMS an deine bei Stromer registrierte Mobiltelefonnummer, gesendet.

See auch Stromer FAQ

OMNI B (und Omni BT App)

per OMNI: keine Option

per OMNI BT App:
Sollte der PIN-Code bei einem Stromer mit OMNI B vergessen-/verloren/ falsch sein, oder hat man die Omni BT App gelöscht, gibt es aufgrund der Verbindungsarchitektur (Bluetooth) selber keine Möglichkeit den PIN-Code neu zu definieren.

With the FW SUI 3.4.2.4 (07.01.2022) wurde deshalb neu das «PUK Feature» hinzugefügt.
Nach Vorweisung eines Fahrzeugausweises oder Kaufbelegs und/oder der VIN-Nummer kann der PIN-Code durch einen Stromerhändler über das Stromer Serviceportal zurückgesetzt werden. Dazu muss der Stromer physisch in die Werkstatt, damit eine Kabelverbindung (USB-Port) mit dem Omni hergestellt werden kann.

See auch OMNI / DISPLAY V1, V1.1 → ,Omni BT App – Probleme mit der Verbindung‘
See auch OMNI / DISPLAY V1, V1.1 → ,Omni BT App – Verwendung / How to use‘
See FAQ ,Halterwechsel – Occasion-Stromer‘

See TMM SENSOR - 'The QR code sticker - what's it all about?

See here in the FAQ: 'Rims / hubs / wheel bearings - Which brands does Stromer use?

The frame of a bicycle / pedelec, S-pedelec, MTB... consists of many individual parts. If you talk about reach, backsweep, stem or fork travel, this is the normal naming in technical literature, but in everyday life it usually means little to the layman. In the here I have summarized and illustrated the most important terms and designations.

A new electricity account can your Stromer dealer create. Alternatively, you can download the Stromer OMNI app and create a new account through it. See also the video from Stromer: "How To: Add a Stromer to the new OMNI app" (EN)

Nachdem das Konto erstellt ist, kann man einen neuen oder einen Occasions-Stromer dem Profil hinzufügen. See Frequently Asked Questions „Halterwechsel – Occasion-Stromer“. Der erste Sperrcode (PIN) wird zufällig generiert und bei der Aktivierung des Stromers per SMS an die registrierte Mobilnummer und per E-Mail an die registrierte E-Mail-Adresse zugestellt.

Beim Omni BT wird kein Aktivierungslink versendet. Man muss den PIN über die Omni-BT-App erstmalig festlegen.

See FAQ – ‚Change of ownership / Register used Stromer / Remove Stromer from app / Problems‘ 

Wheel tires do not have a uniform Size designation which makes a direct comparison difficult. Three designations are common:

Stromer uses tires from Pirelli and Vee Tire. There are also differences in the design, so-called clincher or folding tires. The current tire line-up (as of May 2024) includes both clincher and folding tires. The clincher tires in particular are very difficult to get off the rim when changing, e.g. due to a puncture. If you use the wrong tool or procedure to change the tire, you risk damaging the rim or the tire bead.

These two videos, for example, show the easiest way to deal with 'stubborn' rims / tires:

> Tips & tricks for removing MTB & eMTB tires
> Changing MTB tires / hard casing - no problem / Tips & tricks

The permissible pressure range is specified by the manufacturer on the tire sidewall. Here is the Pirelli Cycle-e ST of the Stromer ST3.

Stromer recommends the following tire pressure:
ST5 | ST3 | ST1 (27,5″- tires): 2.2 bar / 32 psi
ST2 S | ST2 | ST1 X | ST1 (26″ - tires): 3 bar / 43.5 psi

The higher the air pressure, the lower the rolling resistance, wear and susceptibility to punctures. The lower the air pressure, the greater the comfort and grip of the tire. The permissible pressure range should not be exceeded! As more weight is placed on the rear wheel, the pressure can be set 0.2 to 0.4 bar higher than for the front wheel.

The air pressure should be checked and corrected at least once a month. Even the tightest bicycle inner tubes lose pressure continuously. A pressure loss of 1 bar per month can be considered normal. The pressure loss is significantly faster at high pressures and significantly slower at low pressures.

Legal situation: 

For normal Pedelecs with pedal assistance up to 25 km/h the law does not prescribe any special tires.

For S-pedelecs with a maximum speed of 45 km/h, special approval of the tires is required. They must comply with the ECE-R75 approval valid in the EU. In Switzerland, type approval is required in accordance with Art. 18 let. a.

See also PIMP myStromer - ‚Rims 27.5″ - Alternatives‘
See also here in the FAQ - ‚Hose - which one is needed‘

See BREMSEN - 'Recuperation and recuperation'

Mit der FW 4.4.3.4 vom 7. Feb. 2024 wurde gleichzeitig eine neue Version der Omni App (iOS = 4.0.0 (2833)) ausgeliefert, welche die neue Funktion ‚RIDING DISPLAY’ enthält.

It transfers the essential parts of the driving parameters from the Omni to the Mobile.

Furnishings

Siehe die Installationsanleitung / FAQ / Problemlösung der  myStromer AG (EN / EN)

The setup is done in a few steps. This is briefly explained on the start page of the Omni under 'Further information'. To be able to use Smartlock and the Riding Display together, an existing connection with 'Smartlock' or 'Helmet' (in the Omni under Menu > Bluetooth) must be disconnected from the Bluetooth connection. You will be asked whether you want to activate the 'Omni App' option. Only when the classic way (Omni > Menu > Bluetooth > Smart Lock) has been deactivated, the smartphone can be re-paired with Bluetooth (Omni > Menu > Bluetooth > Omni App). If this is successful, the 'Riding Display' and 'Smartlock' can then be activated and used in the 'Omni App' under 'Configuration'.

Um das Riding Display anzuzeigen, muss man in der Omni App noch auf ‚Riding Display‘ tippen. Danach erscheint es in der Omni App.

Riding display and SmartLock

Mit Verwendung des Riding Display wird ebenfalls die Funktion ‚Smart Lock‘ in die Omni-App integriert und kann dort unter Konfiguration in drei Schritten bezüglich dee Empfindlichkeit eingestellt werden. Die klassische Version ‚Smart Lock‘ im Omni ist feiner abegstuft und hat 10 Stufen.

Bluetooth display

Beim klassischen Smart Lock wird im Omni, sowie der Omni-App das BT-Symbol angezeigt und im Smartphone unter Bluetooth der Stromer als ‚verbunden‘ angezeigt.

Experience (as of 1/2025)

Bei mir ging die Einrichtung (iPhone 15 Pro May) problemlos, die Verbindung mit Bluetooth ist allerdings instabil und das Riding Display in der Praxis so nicht brauchbar. Ich bin scheinbar not alone.

Experience (as at 3/2025)

Mit dem Firware Update 4.5.0.3 (05-03-2025) funktioniert bei mir Smart Lock über den Weg des Riding Display nicht mehr.

Note

Smart Lock via the Omni app cannot be used on several Stromers at the same time.

 See also PROBLEME - SMART LOCK - 'What is Smart Lock'

See ELEKTRIK & ELEKTRONIK - Cable diagrams | Pin assignment - ‚Rosenberger - Plug connection‘

Alternatively, there is the Air Plus. This is thicker, contains more butyl rubber and ensures that you need to use the air pump less.

Tip: You can carry a GAADI tube with you for quick repairs on the road. This tube with two ends is much easier to fit as the rear wheel does not have to be removed. Furthermore, there is no need for the tedious search for leaks and patching the hole on the road. An installation video from Gaadi is available here or here.

On older Stromer models (ST1 | ST2 | ST2S), Stromer used a mechanical locking mechanism with a tubular key for the battery compartment.

All keys are provided with a number. You can also find these in the Omni app under: Profile (bottom right) > Service booklet > Bike components > Keys.

A replacement key can be obtained from the electricity dealer or from CAMLOCK be ordered. However, the matter is expensive: (Source). Here are the prices at Camlock (as of 2022):

• One key = 13,09€
• Minimum order value = 50€
• Shipping = 18.60€

See PROBLEMS - MISCELLANEOUS - 'ST3 Pinion / ST5 - Dropout with missing bolt?'

A few serial numbers can be found in the Stromer OMNI app under Profile > Service Booklet > ‚Bike Components. 

The VIN (Vehicle Identification Number) of Stromer S-Pedelecs is the official number with which a Stromer is registered in the CoC (Certificate of Conformity) in the vehicle documents and at Stromer. It is required for service work as well as administrative changes (change of owner...).

The VIN can be found:

• In the OMNI app under PROFILE (bottom right) > Service Book > VIN
• on a sticker in the battery compartment
• under the right-hand chain stay

With the firmware SUI FW 4.3.9.5 (10.08.2022), Stromer has introduced a service recommendation in the Omni:

• The service icon on the OMNI interface appears after the first 500 km
• A new service recommendation appears after 1 year or 3,000 km after the last service
• The service interval can be configured by the dealer
• In the Stromer OMNI App, the service can be reset, and the service reminder can be switched on and off (Omni App > Profile > Service: Reminder = inactive).

After purchasing a new Stromer, it is advisable to have an initial service/check carried out by the dealer after 300-1000 km. This should be free of charge and is part of the purchase.

Service recommendation

The service work that should be done and when is listed in the owner's manual. However, the intended use of the electric vehicle is also a deciding factor.

• Some riders use the Stromer sparingly, others extensively.
• Some are fair-weather riders, others are all-weather riders.„
• Some maintain the power adapter, others little or not at all.

Whether you do it yourself or have it done is a personal decision and probably also depends on DIY skills. If you go to a dealer, it's certainly not cheap, but you're on the safe side, provided the dealer is reputable.

My practice

User Profile 
ST3 (j. 2019). Rarely wet driving, no salt in winter, recuperation used.

Service Indicator:
I have deactivated the service display and do all the maintenance work myself.

Maintenance:
The chain and drive unit are regularly maintained. The wheel bearings and bottom bracket are not lubricated.

Replaced parts on my ST3, year 2019:
See Here in the FAQ – ,‘Wear and tear and service life of components'

Cleaning
I just clean the bike with a bucket of water and a bit of washing-up liquid, a sponge and a microfiber cloth. Then I apply Muc Off BikeProtect on. I also check visually:

• Check the brake callipers for traces of oil and secure the brake pads
• The caster of the front wheel
• The bottom bracket for smooth running and side play of the left crank
• Check the cassette and freewheel for play
• You can also hear or notice when something is mechanically wrong. The drive becomes louder or jumps if it is dirty or worn. The steering creaks or hitches. If something is wrong with the brakes, you can hear and feel it ;-).

See OMNI - 'Show service menu'

See SHIFTING - Shimano > ‚Shadow RD+ – what is that?‘

See PROBLEMS - 'Smartlock (formerly 'Seamless ride')'

The ST5 Pinion and ST7 models use the Pinion C1.9 and C1.12 gears with Smart.Shift. Pinion offers the app 'Pinion Smart.Shift' with which you can configure the gearshift.

Does this work with Stromer? The answer is no.

See also SCHALTUNG - PINION - 'Smart.Shift App'.

Extract from Wikipedia:

In the field of electric vehicles, the state of health (SoH) is a measure of the condition of a battery (cell/module) compared to its new condition. The SoH unit is a percentage [%] and refers to the new capacity (100 %) in accordance with the specifications.

Unlike the batteries in electric cars, the space in e-bikes is severely restricted, the weight is limited and thermal management of the battery is not possible. Furthermore, the aim is to achieve maximum riding distance with the greatest possible support. All in all, this means that the battery is usually operated to the limits of its operating parameters. Gentle treatment, in terms of an ideal operating temperature range, charging and discharging currents, a limited charging stroke DoD (Depth of Discharge) or a limited charging window are usually not possible.

Folge davon ist neben der chemisch bedingten kalendarischen Alterung eine recht zügige Alterung durch den zyklischen Alltagsbetrieb. Zum Thema SoH bei Stromer see auch folgende Kapitel:

See the following topics under the chapter ‚BATTERY‘:

• 'Aging - SoH loss'
• 'Self-discharge of a BQ983 battery'
• Akkugesundheit… „SoH“ ? (Wie erfahre ich den SoH?)
• 'Theory & terminology compendium for Li-ion batteries'

Wie die Alterung mit einem Zusatzakku (Extender) verzögert werden kann beschriebe ich in folgendem Kapitel. See Pimp my STROMER – ‚Battery Extender'

See PROBLEMS - BATTERY - 'Battery cannot be ejected because Stromer does not start?

See PROBLEMS - General - ‚Stromer does not start - (battery cannot be removed)‘

Stromer introduced the 'Stromer sound' with the ST5 Pinion model (Limited Edition was available from Dec. 2023). What this is and what it sounds like can be seen in the video here can be viewed or heard.

In the Omni Service menu there is a so-called. System Integration T(SIT). The test routine itself is called Test Runner, which is used to test the components built into the Stromer, such as the motor, controller, battery, brakes, sensor, etc. It can be accessed via the SERVICE MENU - RUN TESTS.

See also ELECTRICITY / ELECTRONICS – Diagnostics – 'SIT(Test Runner) - Test components'
See TECHNOLOGY – BATTERY – 'Battery SELF_CHECK - Recognize problems'

See TMM-SENSOR - 'Problems with support and solutions'

See PIMP mySTROMER - 'USB connection external - wireless charging'

See TMM-SENSOR - Use Trace'

Factors

The mileage of wearing parts such as brake discs, brake pads, chains, belts and tires depends on various parameters:

• Driving style
• Route profile
• System weight
• Using recuperation (button ring) and setting the brake sensor
• Use of the bike as a "fair-weather" or "all-weather" bike
• Care

It is impossible to make a general statement as the parameters are too individual.

Own experiences

Experience with my ST3 (as of Feb. 2026, 42,186 km):

• Chain: KMC e11 EPT - approx. 10’000 - 11’000 km (oiled after approx. 500-1’000 km)
• Sprocket 11, ditto chain, 13 etc. as required
• Tires: Pirelli Cycle-e ST: changed:
  
  • In front: after 28,353 km
  • Rear: after 15,000 km (no flat tires so far)
• Brake pads: (hilly terrain, recuperation used, brake sensor 100%)
  
  • Rear: SwissStop after 37,886 km, still good *
  • Front: TopBrake since 28,699 km, still good *
• Brake disks: Original
• Front wheel bearing: 28,353 km
• Bottom bracket: 34’010 km
• Engine mounts: 38‘970 km
• Freewheel: Original
• BQ983 battery: 21,000 km until SoH 74% was reached

* Replaced at 4,300 or 13,487 km due to squeaking

See also:

See also PROBLEMS - chain (-blade) / pulleys and belts:

• ,Chain jumps, slips, crunches, is thrown off'
• 'Chainring / bottom bracket - wear and tear?
• 'Broken belt, has lost teeth'

See also SCHALTUNG - 'Comparison: costs / care / (life) maintenance' under life expectancy

See also here in the FAQ:

• 'Chain - measure wear'
• 'Number of chain links / brand?
• Care...'

The VIN (Vehicle Identification Number) of Stromer S-Pedelecs is the official number with which a Stromer is registered in the CoC (Certificate of Conformity = operating license) is registered in the vehicle documents and at Stromer. It is required for service work but also for administrative changes (change of owner...).

The VIN can be found:

• on a sticker in the battery compartment
• under the right-hand chain stay
• in the OMNI app under PROFILE (bottom right) - Service booklet > VIN

Wicket, from English, means gate. At Stromer, these are cable distributors with Rosenberger connectors or, in older models, D-Sub 7-pin connectors, which are both installed directly at the lower end of the battery compartment. They connect the battery to the bicycle's electrical system and are thus essentially the gate from the battery to the bike.

Where is it installed?

The Wicket cable can also be a source of faults. Thermal stress on older versions with the SAE connection can lead to deformation or short circuits.

Error E210003 or E21041A? > See ERROR AND WARNING MESSAGES

See also:

• WREN USD suspension fork adjustment (ST3/ST5/ST5)
• WREN Suspension Fork - User Manual Stromer BikesEN / EN)