NOTE: The BadassBox does not retain accurate speed data on the e-bike’s display. To monitor your actual speed, you’ll need an external GPS device such as a bike computer or smartphone. If maintaining accurate speedometer readings is important to you, we recommend choosing the EPAspeed BOX — the only contactless tuning solution that preserves full speedometer functionality Feature ❌ Conventional Tuning Chips ✅ EPAspeed BOX Installation Time Tool-free installation; mounts on the chainstay in approx. 1–2 minutes. Same fast installation time (1–2 minutes), with a more secure and vibration-resistant fit. Maximum Supported Speed Assistance typically increases up to 35–37 km/h, depending on wheel size. Same assistance range of 35-37 km/h, but with higher measurement accuracy thanks to improved sensing. Speed Display Accuracy Output speed on the bike’s display becomes random and highly inaccurate, requiring an external GPS device for correct speed readings. Maintains correct display readings using a 1 : 1.5 speed-correction algorithm, providing accurate speed feedback without external devices. Battery Lifetime Approx. 5,000 km or ~6 months under regular use. Approx. 8,000 km or ~12 months, depending on conditions — engineered for extended service life. Build Quality Uses standard materials; the pin-lock mechanism is prone to wear and may break under repeated removal or vibration. Reinforced enclosure designed to lock directly into the speed sensor with enhanced durability and anti-vibration structure to prevent failures. Included Components Box, magnet, battery. Spacer not included, which may be required for some chainstay geometries. Box, magnet, battery. Includes multiple spacers, anti-vibration shims, and zip ties for universal and secure fitting. 👉 Click here to view the EPAspeed BOX for Bosch Slim Sensor badassBox 4 for BOSCH Slim Sensor E-BIKE TUNING WITH THE BADASSBOX FOR PEDELECS WITH BOSCH MOTOR Our newest and best e-bike tuning for all Bosch mid-mounted drives incl. 4th generation/2022. 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. Attention, you only need this set if the Bosch Slim sensor is attached to the chain stay using the original adapter (first picture) or is integrated in the dropout of your bike (second picture).If the Bosch sensor (third picture) is mounted on your chain stay and is easily accessible, you only need one badassBox 4 Bosch.The badassBox 4 Bosch Slim set includes all the parts you need to mount the badassBox 4 on your e-bike with a Bosch mid-mounted motor and Bosch Slim sensor:badasBox 4 bosch Bosch Slim-AdapterWith the badassBox 4 Bosch Slim Set you not only get all the necessary parts to tune your e-bike in one 'click', but you also save money.INSTALLATIONThe Bosch Slim Sensor is either mounted on the chain stay or integrated into the dropout. Here the slim speed sensor is classically mounted on the chain stay with an adapter.There, the sensor must be freed from the adapter, the original adapter is unscrewed and replaced by our adapter. Here the slim speed sensor is integrated near the rear axle. First, the rear wheel must be removed.Then the sensor is removed from the bracket and mounted with our adapter at a suitable place on the chain stay using cable ties.
