Stromer has voluntarily recalled approximately 6,500 “WREN” front forks fitted to its ST3, ST5 and ST7 speed pedelecs. Fewer than 5% of Stromer bikes currently in use are affected.

Specifically, some ST3, ST5 and ST7 models are affected — but only if they are equipped with WREN suspension forks with the serial numbers 403860-XXXXXXX-XXXX or 403523-XXXXXXX-XXXX.

The serial number can be found on a QR code sticker on the inside of the left or right stanchion tube.

If you are unsure whether your Stromer model is affected, please check our dedicated service webpage.

Production of the new fork kits is running at full capacity. The first parts arrived with us in mid-February and are currently being distributed to dealers, which means the first repairs can already start now. We are flying components in weekly by air freight in order to accelerate the process as much as possible.

Because the WREN suspension forks used on the ST3, ST5 and ST7 models were developed specifically for Stromer, the model-specific versions require precise logistics. We expect the delivery of repair parts to be fully completed by the end of May.

Your authorised Stromer dealer will inform you directly as soon as the parts for your bike are available. Thank you for your patience during this complex logistics process.

Activating Smartlock

Smartlock makes your Stromer even smarter: your bike locks and unlocks automatically when you approach or leave. There is no need to press a button. If Smartlock stops working, you can quickly fix it by reconnecting your Stromer with the OMNI app. Follow the steps below to get it working again:

Requirements

• Smartphone with Stromer OMNI app installed
• OMNI C or OMNI B basic with connectivity upgrade required, software version 4.5.0.3 or newer

1. Remove Stromer from your phone

• Open OMNI app → Smartlock → Disconnect/Unlink → OK
• Go to Bluetooth settings → remove your Stromer
  • Android: Unpair
  • iPhone: Ignore this device

2. Remove connection from your Stromer

• Switch OMNI App → On (if not already on)
• Under Devices → remove your phone if still listed

3. Reconnect

• In OMNI app → Smartlock → Configuration/Theft protection
• On Stromer → Menu → Bluetooth → OMNI App → Devices → New pairing drag embedded assetpublishedbluetooth omni app devices

• In OMNI app → Connect → Select your Stromer → Confirm

Trouble shooting: If you can't reconnect your bike, restart your Stromer and try again.

4. Using Smartlock

• App must be open (background is sufficient)
• Bike must be switched on
• Set distance in OMNI app: Close (1–2 m), Medium (3–5 m), Far (7–10 m)

That’s it! Your Stromer is now ready to lock and unlock automatically again when you get on or off.

Activating Smart.Shift Pre.Select

With software update 4.5.1.3, we introduced Pre.Select, a semi-automatic shifting mode. In this mode, your Stromer automatically shifts to the gear best suited to your current speed when you’re coasting without pedaling. This way, the correct gear is ready when you start pedaling again.

Requirements

• Stromer Bike with Pinion Smart.Shift

Additional information

• You can adjust your preferred cadence individually.
• The configured start gear from Start.Select is also taken into account.
• Manual shifting remains possible at any time.

How to activate

Go to:
MENU → BIKE → SMART.SHIFT → PRE.SELECT

The range of an e-bike, meaning how far you can ride on a single battery charge, is influenced by many factors. These include the rider’s weight, the terrain (such as hills and elevation changes), the surface (asphalt, gravel, wet or dry), weather conditions (wind, rain, temperature), and tire pressure. The level of motor assistance, selected gear, pedaling cadence, riding style, average speed, riding position, and the number of stops per trip also play a role. Even the condition of wear-and-tear components and the age and capacity of the battery can significantly affect the range. The more efficiently you ride, the farther you’ll go.