If you own a modern electric bike equipped with a Bosch Smart System motor, you already know how smooth, efficient, and enjoyable the ride can be. However, many riders quickly find themselves frustrated by the restrictive factory speed limiters. In Europe, the motor assistance cuts out right at 25 km/h, leaving plenty of leg power and battery potential untapped. If you are looking to break past these artificial boundaries and experience the true performance capabilities of your e-bike, the SpeedBox 1.1 tuning chip is the ultimate aftermarket upgrade.
As the best-selling tuning chip for Bosch 4th and 5th generation motors featuring round connectors, the SpeedBox 1.1 safely removes the standard 25 km/h cap. Out of the box, it features a factory preset maximum limit of 35 km/h (22 mph for US models), which is fully adjustable to match your riding comfort. Activating and deactivating the chip is remarkably intuitive and integrated seamlessly into your existing setup. Riders can easily toggle the derestriction mode on or off using the built-in "WALK" function or a quick combination of the "+ - + -" buttons on the handlebars.
One of the greatest advantages of the SpeedBox 1.1 is its broad compatibility across the Bosch Smart System ecosystems. It integrates flawlessly with a variety of popular components, including the Kiox 300, Kiox 500, Intuvia 100, and Purion 200 or 400 displays, alongside control units like the LED Remote, Mini Remote, and System Controller. While the chip does mean your display will register values roughly 10 km/h lower than your actual physical speed, it ensures that your motor continues to assist you smoothly at higher velocities without jarring cutoffs.
Installation is a straightforward process designed with the home mechanic in mind. SpeedBox provides detailed video guides, printed manuals, and step-by-step illustrated instructions that make plugging the hardware into your motor a breeze using basic tools. To ensure long-term, trouble-free operation, riders are reminded to let the bike run through its data "countdown" process at the end of a ride before turning it off, and to disable automatic manufacturer software updates. It is important to note that while this chip offers an exhilarating off-road boost, users should always verify local legislation regarding derestricted e-bikes before hitting the trails.
