About the product
SpeedBox 1.4 for Bosch Performance Line SX – Unlock Your E-Bike’s Full Potential
The SpeedBox 1.4 is an advanced tuning module, designed for e-bikes equipped with the Bosch Performance Line SX motor with two upper mounting screws and a rear wheel valve magnet (Rim Magnet). It removes the factory 25 km/h speed limit.
Key Features – SpeedBox 1.4
Maximum speed: Factory preset to 35 km/h (EU) / 22 mph (US). Do not change the speed limit.
Speed display: Shows values approximately 10 km/h lower than the actual speed.
Activation/deactivation: SpeedBox Connect app, WALK function or + – + – button sequence.
Adjustable speed limit: Yes.
Software updates: Supported.
Minimum mileage before installation: 10 km for a new e-bike.
IMPORTANT: After installing the SpeedBox, do not update the e-bike's system software.
For e-bikes with US software, the actual speed limit after activation is approximately 28 mph. The displayed value may differ.
Compatibility
Motors
Bosch Performance Line SX, 4th generation
Motor models BDU3142 and BDU3143
Motors with two upper mounting screws and a rear wheel valve magnet (Rim Magnet)
Displays
Bosch Kiox 300
Bosch Kiox 500
Bosch Intuvia 100
Bosch Purion 200
Bosch Purion 400
Control Units
Bosch LED Remote
Bosch Mini Remote
Bosch System Controller
Not Compatible With
Bosch Performance Line CX motors
Motors with a conventional spoke magnet
Bosch ABS systems
Enviolo Automatiq systems