SIMPLIFIED INSTALLATION
No need to find a suitable position for the Magnet Simulator

DESIGNED FOR:
Performance Line SX motors of 4. Gen
(Motor Models BDU3144)
(Motor Models BDU3145)

PROPERTIES:
Maximum speed: Unlimited (max 35 km/h recommended)
Display shows:
Real speed: NO (only in SpeedBox App)
Correct travelled distance: After the countdown process is finished
Activation/deactivation (do not perform while riding):
SpeedBox App
WALK function
Buttons - + - +
Indication of tuning activation/deactivation: YES (3.5/2.5 km/h)

Compatible with:
Performance Line SX motors of 4. Gen (Models BDU3144, BDU3145)
E-bikes that have a magnet attached to a valve (Bosch Rim Magnet)
The current Bosch software version
Not compatible with:
Standard magnet
ABS system

Please check your e-bike type and motor space before purchasing the product

SpeedBox 1.5 B.Tuning for Bosch SX (Smart System + Rim Magnet)
SpeedBox 1.5 B.Tuning is a premium tuning chip designed for Bosch Performance Line SX Gen4 motors (BDU3144, BDU3145) equipped with the Smart System and Rim Magnet configuration. This version offers Bluetooth connectivity and full integration with the SpeedBox App, allowing riders to unlock speed limits and monitor ride data directly from their mobile device.

Simplified Installation
No need to position a separate magnet simulator

Uses original connectors for secure, plug-and-play setup

Compatible with Bosch Rim Magnet (valve-mounted)

Not compatible with standard spoke magnets or ABS systems

Designed For
Bosch Performance Line SX motors (4th Generation)

Motor Models: BDU3144, BDU3145

E-bikes with Smart System and Rim Magnet

Current Bosch software versions (see compatibility list)

Key Features
Feature Description
Maximum Speed Unlimited (recommended max 35 km/h)
Speed Display Real speed shown only in SpeedBox App
Distance Accuracy Correct after countdown process
Activation Methods SpeedBox App, WALK assist, or button sequence (- + - +)
Tuning Status Display Yes (3.5 km/h = ON, 2.5 km/h = OFF)
Speed Limit Customization Adjustable via app or control unit (up to 99 km/h)
SpeedBox App Integration
Real-time speed, distance, and trip data

Save and compare rides

Speed limit adjustment and Invisible Mode

Motor diagnostics and PIN-protected access

Available on Google Play and App Store

Installation Notes
Ride your new e-bike at least 10 km before activating tuning

Connect male-female connectors in the direction of the lock—do not twist

Activate/deactivate tuning only when stationary

Allow the countdown to finish before turning off or removing the display

Legal and Safety Disclaimer
SpeedBox products are intended for use on private property only. Use on public roads may violate local laws and void your e-bike’s warranty. Always wear protective gear and disable automatic firmware updates in the eBike Flow App to reduce detection risk.

Product Fitment