NOTE: Conventional tuning modules offer only limited functionality compared to today’s e-bike standards. They often rely on complex and unintuitive display button sequences for activating, deactivating, or adjusting speed limits. This makes operation cumbersome, especially during a ride. In some cases, users must stop the bicycle and manually rotate the rear wheel multiple times to initiate or confirm the selected setting — a process that is inefficient and inconvenient for real-world riding conditions.
|
Feature |
❌ Conventional Tuning Chips |
✅ EPAspeed B.Tuning |
|
Setup & Activation |
Complicated button combinations, easy to forget |
Simple app control — activate or deactivate with a tap |
|
Speed Limit Adjustment |
Requires rotating the wheel or entering complex codes |
Instantly adjustable in the EPAspeed app |
|
Firmware Resistance |
Easily disabled after motor or display updates |
Fully resistant to OEM firmware updates |
|
Display Compatibility |
Often shows wrong speed or altered speed |
Preserves full speed and distance accuracy |
|
Installation |
Wired directly into display or motor — risk of detection |
Contactless design — no software interference |
|
Bluetooth Functionality |
Not available |
Built-in Bluetooth — control settings, monitor stats, set limits |
|
User Experience |
Outdated, difficult to use, and not intuitive |
Modern, seamless, and designed for real e-MTB riders |
|
Safety & Reliability |
Risk of error codes, firmware lockout, or damage during updates |
Engineered for long-term reliability with non-invasive integration |
In contrast, the EPAspeed B.Tuning series represents the next generation of e-bike tuning — fully app-controlled, firmware-resistant, and designed for effortless operation. With Bluetooth connectivity, intuitive controls, and invisible tuning functionality, EPAspeed delivers precision, reliability, and freedom unmatched by conventional solutions.
Key Features
• Tuning Control – Instantly activate or deactivate tuning
• Adjustable Speed Limits – Set your preferred maximum assistance speed
• Invisible Tuning Mode – Undetectable operation for smooth and safe performance
• Trip Recording – Automatically save and review detailed ride statistics
• Comprehensive Ride Data – Monitor distance, duration, average & max speed, and elevation
👉 Click here to view the EPAspeed 1.4 B.Tuning for Bosch
COMPATIBILITY & PRODUCT CODE VERIFICATION GUIDE
Important – Please Read Before Purchasing
Before purchasing this device, it is essential to verify the “Product Code” of your Bosch motor to ensure compatibility.
The Product Code is printed directly on the motor label.
In the example image, the two label formats currently used by Bosch are shown, with the Product Codes highlighted in red.
COMPATIBLE BOSCH MOTORS
BDU33 (Gen3): Performance Line, Active Line, Active Line Plus
BDU3142 / BDU3143 (Gen4): Performance Line SX, Motor mounting: 2 upper bolts
BDU3144 / BDU3145 (Gen4): Motor mounting: 2 diagonal bolts
BDU37 (Gen4): Performance Line CX, Performance Line CX-Race
BDU38 (Gen5): Performance Line SX, Performance Line CX, Performance Line CX-R
NOT COMPATIBLE WITH
❌ Classic Spoke Magnet Systems
This device is not compatible with e-bikes equipped with the traditional magnet mounted on the wheel spokes or brake disc.
❌ Bosch ABS Equipped Bikes
This device is not compatible with e-bikes using the Bosch ABS braking system.
❌ Bosch ConnectModule / GPS Systems
This device is not compatible with e-bikes equipped with the Bosch ConnectModule GPS system.
The casing got completely re-designed and, by popular demand, now features an additional water-proof sealing. Unlike its predecessor, the badassBox 5 is compatible with a wide range of motor systems, given the right adapter set. Therefore keeping your badassBox 5 when upgrading your eBike is as easy as ordering a new suitable adapter. Another novelty is the ability to update the firmware of the badassBox 5 through your own mobile device. On top of that, the optional Boost Buddy App provides a speedometer and access to personal configurations of the box. Energy is supplied by the good-old AAA-Battery, which saves the use of special cables and makes the installation a breeze. The inner circuits are protected againt moisture and mechanical stress through a special filling compound.
PRODUCT DESCRIPTION
Contactless e-bike tuning
Streamlined design for casing
Boost Buddy App for your correct speed on iOS and Android
Firmware updates through your smart phone
Flexibility with adapters
THE DELIVERY INCLUDES THE FOLLOWING PARTS:
one badassBox 5
one badassBox 5 housing cover
one AAA battery
one spoke magnet with thumb screw
INSTRUCTIONS:
DE: https://drive.google.com/file/d/1xeNkIsXwV-iq0Nj2PBE2aLPp9490L0Vm/view?usp=sharing
EN: https://drive.google.com/file/d/1Ua1HZjGNnH5sc5oQNu8iOG0BaZfgn_FJ/view?usp=sharing
