BadassBox 4 for Giant ISS sensor

Derestrict your e-bike to reach speeds up to 25mph (40km/h)

This tuning kit is compatible with all Giant Syncdrive motors with a specific speed sensor! Please refer to the sensor pictures!

Regular price£149.00

&Free Delivery Worldwide

You can save money when buying more than one tuning kit. Can be combined with other brand/type tuning kits!
Buy 2 save £4.47
£149.00 £144.53
Buy 3 save £10.43
£149.00 £138.57


- TOM E.

warranty 2 YEAR WARRANTY
easy to install EASY TO INSTALL

Main Product Information

The badassBox is attached to the speed sensor of the e-bike and overrides the 16 mph (25 km/h) speed limit - you can expect to reach speeds of up to 25 mph (40km/h) , depending on the bike and gearing. Your displayed speed will be 2 times slower than your real speed. We recommend the use of GPS-related accessories for a more precise data acquisition of driving data (smartphone, bike computer, etc.).

The tuning kit manipulates the speed signal without altering the motor's power relative to pedaling speed. This guarantees a smooth motor control without speed limit interruptions. Depending on a tuning kit, some determine when assistance stops, while others remove the restriction entirely for continuous support. However, the achievable speed mostly depends on the eBike model. Achievable speed can be calculated using a simple formula:

Speed = Cadence [rpm] * Wheel circumference [mm] * Front Chainring Teeth / Rear Chainring Teeth * 60 [min/h] / 1.000.000 [mm/km]

The contactless and wireless badassBox transmits a modified speed 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 or removed in seconds.

If this sensor of your Giant motor - as shown in the picture below - is integrated into your bike, then the badassBox4 Giant 2020 is exactly what you need.

If the sensor of your Giant motor is located on the chain stay of your bike, then the badassBox4 Giant you would need BadassBox 4 for Giant 2017-2021 motors

A quality product designed, engineered and manufactured in Germany. The assembly requires a small conversion. Please read the instructions on the left before ordering! Please check before ordering whether the cable of your sensor can be pulled out far enough from the dropout, so that the sensor can be attached to the chainstay in front of the brake disc. Only under this condition, the sensor can be used together with the badassBox.

The delivery includes the following parts:
- one badassBox 4 Giant 2020
- one badassBox 4 housing cover
- one AAA battery
- one spoke magnet with thumb screw
- four cable ties

The integrated Giant sensor is located in the area of the dropout. To get to the sensor you need to remove the rear wheel. Find the position of the integrated sensor in the dropout of your e-Bike and loosen the screws that secure the sensor.

Place the sensor in the designated recess on the badassBox.

The badassBox Giant 2020 is mounted with the sensor by using cable ties (included) on the chainstay.

For the first assembly, the supplied spoke magnet must be mounted instead of the original magnet. Our spoke magnet works without badassBox identically to the original magnet, but with badassBox mounted, it is necessary for the function of our patented field amplification.

The spoke magnet must be aligned next to the badassBox. To check the position of the magnet on the bike when stationary, lift the rear, spin the rear wheel (not the cranks!) and let it spin. Check the speedometer or app of your bike. The indicated speed should be even and slowly decrease while the rear wheel coasts down. If the spoke magnet touches the badassBox, the spoke magnet must be placed as close as possible to the badassBox and turned 90°. Done!

Please note that the operation of this type of modified electric bikes on public roads may be against the law in some countries. The manufacturer takes no responsibility for damages resulting from the use of BadassBox products. Electric bikes equipped with BadassBox products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with BadassBox products can be used exclusively on private property and entirely at one’s own risk. The use of BadassBox products may void the warranty of your ebike.

We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.

BadassBox products are thoroughly tested and we stand by their quality - Badass Box provides 2 years warranty to all their products.

Warranty does not cover damage resulting from eBike software updates. Remove the tuning kit before updating the software. Check with us first to ensure the kit is compatible with your updated eBike. We cannot guarantee that the kit will function the same after updates. Please exercise caution.

Tuning kit is Compatible with GIANT SYNCDRIVE MOTORS

Unlock the full potential of your ebike!

  • You will ride faster and experience the thrills of owning a derestricted ebike -you will love the difference!
  • Install it effortlessly - easy and fast installation!
  •  Feel safe for your e-bike and warranty - it's safe for ebike and undetectable to keep your warranty safe!

BadassBox 4 for Giant ISS sensor
BadassBox 4 for Giant ISS sensor

Quick plug-and-play installation. No setup!

  • Increase the speed limiter from original 16 mph (25km/h) up to 25mph (40km/h) speed limit!
  • Fully undetectable! After BadassBox removal there is no way to tell if it has been used on your e-bike!
  • Get after-sales support from us and a two year warranty from BadassBox!


The bike feels completely different once derestricted - it's just like a whole different bike! The rides are so much more fun now! Tuning kits are safe to your bike and every ebiker should have one installed! You will love riding your ebike with it - guaranteed!

Matt - Owner of Two Wheels Empire

What Our Clients Say About It?

Who Are We?

From Riders to Riders

In Two Wheels Empire, we trust in innovation, premium quality and sustainability - that's what our business is about. Feel assured all our ebike products are carefully selected and we stand by them: if it's on offer here at Two Wheels Empire - it's been tested and selected by our team. Riders working with us are here to help you enjoy your ebike rides!

We are here to build an Empire, of people who strive for freedom, thrills and adventure, it's about time to make the best of your rides!