badassBox 4 for GIANT / YAMAHA


5.0/5.0 based on 44 reviews

€145,00 €155,00 Save €10

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Unlock the speed limit of your electric bike with a Yamaha-Giant badassBox tuning box. The badassBox is the easier ebike tuning to install and remove. No wiring or engine cover removal required - just slide the badassBox over the speed sensor and you are ready to go! Unleash the full speed of your ebike engine and ride it like a derestricted e-bike should be!
Our newest and best e-bike tuning for the Giant and Yamaha mid-mounted drive. New streamlined casing with patented snap-lock fastening for even faster mounting and release. Even more robust thanks to a special potting compound from the automotive industry. New electronics for even greater range with a single AAA battery. A quality product designed and manufactured in Germany.
SCOPE OF DELIVERY: badassBox 4 Giant and Yamaha with AAA battery and spoke magnet with thumb screw. 
Only compatible if the magnet is on the wheel spoke. If the magnet is integrated into the brake rotor click here
The badassBox 4 is the result of more than a year's development. We have completely re-designed the casing, made it more streamline and replaced the o-ring of the previous version with our patented snap-lock fastening. Making it more streamline makes it even easier to fit. The new snap-lock fastening means you can attach and remove your badassBox with just one hand in seconds. At customer's request, we have additionally added an optional securing feature on the snap lock using a cable tie.
The CR2 battery has been replaced with a AAA battery, so you can pick up replacement batteries much cheaper on just about any street corner. Tool-free battery change can be carried out quickly and easily while you're on the road – but should only be necessary once a year, or every 7000km. This was made possible by our in-house developed and patented field amplification technology FEET (Field Enhancement & Elimination Technology). To protect against moisture and mechanical stress, the electronics are glued into the casing and completely sealed with a special casting compound.
The badassBox is developed and manufactured exclusively by us in-house. Before and after casting we check each badassBox individually. Customer satisfaction and quality are our top priorities. If you have any questions, don't hesitate to ask – we'll get back to you with an answer straightaway, mostly on the same working day. Due to the high quality and our focus on customer satisfaction, we additionally offer a 1 month money-back guarantee.
The badassBox is attached to the speed sensor of the e-bike and overrides the 25km/h speed limit. Remove it and your e-bike is restored to its original state.
Contactless e-bike tuning
Streamlined, registered design for casing
Patented snap-lock fastening
Securing feature on the housing
Patented field enhancement technology
AAA battery for range in excess of 7,000km
Auto industry potting compound
Doubled quality control
Made in Germany
One month money-back guarantee
The badassBox 4 Giant and Yamaha is fitted over the Giant and Yamaha speed sensor next to the rear wheel. When the snap-lock clicks into position, the badassBox is fitted securely to the sensor. For extra secure fitting, the badassBox can also be fastened with a zip tie.
When the badassBox is first fitted, the spoke magnet that comes with it must be mounted in place of the original magnet. Without the badassBox, our spoke magnet functions identically to the original magnet, but when the badassBox is fitted, the spoke magnet is necessary for our patented field enhancement technology to work properly. Once the badassBox has been fitted onto the sensor, the spoke magnet must be offset to the casing edge in the direction of the snap-lock clasp. If the spoke magnet touches the badassBox, it must be repositioned as near as possible next to the badassBox and turned through ninety degrees. It's now ready for use.
Following removal of the badassBox, the spoke magnet must be returned to its original position.
GIANT INSTALLATION: The speed sensor on most of the Giant ebikes is located too close to the wheel spoke. To gain some clearance between the speed sensor and the magnet relocate the badass magnet on the opposite side of the wheel (the further spoke from the speed sensor). This will prevent the magnet to collide with the box. It may take several attempt until the correct magnet position is found. If further assistance is required please contact our friendly customer service at
The contactless and wireless badassBox transmits a modified signal in order to override the speed limit of your e-bike – without interfering with the motor's electronic circuitry or software. There's no need to open the motor and there is no risk of damaging it. The badassBox can be fitted in seconds – and just as quickly removed, restoring your e-bike to its former road-legal condition.
For all these advantages, a wrong speed, and values derived from it, are displayed. We recommend the use of GPS-related accessories for a more precise data acquisition of driving data (smartphone, bike computer, etc.).
Dimensions: 61 x 43 x 15 mm.
Weight: badassBox 27g, including battery 37g.
Battery: 1.5V AAA battery (IEC R03).