SpeedBox 3.2 for Brose (S-Mag Pro FIT)

Key features

SpeedBox 3.2 for Brose is a tuning chip designed specifically for e-bikes with Brose S-Mag Pro FIT motors. By removing the 25 km/h speed limit, you can fully enjoy the performance of your e-bike.

Tuning control

Switch between the 25 km/h limit and unrestricted mode

Easy installation

Anyone can install it using our clear guides and video instructions

Compatibility

• Motors: Brose S-Mag Pro FIT

• Not compatible with: Enviolo Automatiq

• Not compatible with e-bikes: without a connector in the display port, ABS

Technical specifications

• Maximum speed: Unlimited (depends only on pedaling cadence)

• Display shows: Real values

• Activation / deactivation: Double press of the LIGHT button / alternatively + - + - buttons

• Custom speed limit: Adjustable

• Bluetooth: No

• Updates: No

Installation

The installation is simple and intuitive. Choose the method that suits you best — video tutorial, printed manual, or a detailed step-by-step picture guide.

Video guide

A detailed installation and activation guide is available on our YouTube channel

Tuning control

Activate tuning by double-pressing the LIGHT button.
The display briefly shows 5 km/h (3 mph), which means tuning is active — from this moment there is no speed limit and your speed depends only on motor power and pedaling rhythm.
Deactivate tuning the same way.
The display shows 2 km/h (1 mph) and the bike returns to the original 25 km/h limit.
Alternatively, tuning can be controlled using the + – + – button sequence.

Custom speed limit setting

SpeedBox allows you to set your own speed limit (for example to save battery).
On the controller switch to AUTO mode and then move 3× down and 3× up in this order:
→ STD → ECO → OFF → ECO → STD → AUTO.
The display shows the current speed limit.
Double-press LIGHT to increase the limit by 5 km/h each time.
The last selected limit saves automatically after 5 seconds of inactivity.
Note: The display does not show decimal points.
For example, a displayed value of 3 km/h actually means 30 km/h, and after another double-press it becomes 35 km/h.

Warning

• Use of modified e-bikes is regulated differently in each country — always check local legislation before riding.

• SpeedBox is intended for off-road use only and is used at your own risk.

• The manufacturer is not responsible for damage caused by illegal or improper use.

• Installation may void your e-bike warranty.

• For your safety, use protective equipment and ride responsibly.