Best Badass Bosch 4 2026

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Last Updated - 22.07.2026

Best Choice

01

SPEEDBOX

SpeedBox 1.3 Compatible with Bosch Smart System (Performance Line CX 4th Gen) for E-Bikes with Rim Magnet on Rear Wheel Tuning Chip

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9.9

Exceptional

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The maximum speed can be adjusted by changing the modes: TURBO - eMTB - TOUR+ - ECO - TOUR+ - eMTB - TURBO. After that, the actual speed limit is displayed. The electrical support can also be increased by briefly activating the WALK function or by turning the rear wheel 360° by 5 km/h. The last displayed limit is stored after 15 seconds of inactivity.
Maximum speed: unlimited (max. 35 km/h recommended). Display: real speed: no. Correct driving distance: after countdown process activation/deactivation (do not perform while driving): WALK function or buttons - + - + indicator: yes (3.5/2.5 km/h)
Compatible with: e-bikes with valve magnet (Bosch rim magnet). Newest Bosch software version. Not compatible with: standard magnet ABS system engines of the 5th Generation Performance Line SX SpeedBox App
Compatible with the latest software from Bosch. The most advanced tuning chip for e-bikes with Bosch Performance Line CX motor, 4. generation, smart system and rim magnet. Eliminates the speed limit. Easier Installation - No need to search for the position of the magnet simulator.
After finishing the ride, leave the bike on until 0.0 km/h is displayed. During this process, the remaining time is displayed. After that, the bike can be safely switched off. Do not remove the display before the countdown is complete. Installation video: https://www.youtube.com/watch?v=y8l87ksRUjM&t=15s

299,00 €
02

Badass eBikes

Badass eBikes BadassBox 5 Contactless eBike Tuning Set for Bosch BDU 38 Smart System / Gen5 with App

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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The badassBox must not be operated in road traffic or in the area of effect of the German Road Traffic Regulations. Use is only permitted on private premises. Before using the badassBox, check whether and how the use is permitted by you.
Not compatible are eBikes with integrated ABS system or spoke magnet
Includes dedicated app to display the current speed, set the desired tuning mode and much more
Easy installation possible with simple tools and just as easy to return to its original condition
Completely remove the speed limit
Compatible with the Bosch Smart System "Gen5" for engines of type Performance Line CX (BDU 38/model year 2025) with rim magnet

249,00 €
03

Badass eBikes

Badass eBikes BadassBox 4 Universal Contactless eBike Tuning for Bosch/Brose/Fazua/Impulse/Pendix/Specialized/TQ/Trek

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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The badassBox must not be operated in road traffic or in the area of effect of the German Road Traffic Regulations. Use is only permitted on private premises. Before using the badassBox, check whether and how the use is permitted by you.
Suitable for all Classic sensors in the area of the chainstay (see pictures).
Note: If your sensor is in the dropout, you must order a suitable adapter separately. You can find the entire selection for this in our Badass eBikes store.
Easy installation without tools and just as easy to return to original condition.

154,00 €
04

SPEEDBOX

SPEEDBOX 3.0 for Bosch // eBike Tuning Chip Also for Bosch Engines 2nd, 3rd, 4th Generation Including Crank Puller

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9.3

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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You can activate the SpeedBox 3.0 on an e-bike display.
To connect the SpeedBox to an e-bike, we use colour plugs that are equipped with a key for correct connection, so installing the product is really easy. We have written detailed instructions and created videos that allow every customer to install the SpeedBox. Removing the SpeedBox is as easy as installation. If you have some connection problems, please do not hesitate to contact us.
SpeedBox deactivates the speed limit of the pedelec and you can drive unlimited speed.
E-Bike tuning chip compatible with Bosch e-bike engines also 2023 Gen. 4: Bosch Active (Line, Plus), Performance (Line, CX, Speed), Cargo Line. Also compatible with pre-2023 model years.
Compatible with Displa. Not compatible with the Bosch Smart System! Not compatible with SpeedBox Appys KIOX, INTUVIA, NYON, PURION, COBI.

192,00 €
Value for Money

05

badassBox

Badass Unisex - Adult badassBox 4 Brose, Black

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9.2

Excellent

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Package weight: 60 g
Package dimensions (L x W x H): 3.4 cm x 8.6 cm x 12.4 cm
Number of pack: 1
High quality

154,00 €
06

Badass eBikes

Badass eBikes BadassBox 5 Contactless eBike Tuning Set for Bosch BDU 37 Smart System / Gen5 with App

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

The badassBox must not be operated in road traffic or in the area of effect of the German Road Traffic Regulations. Use is only permitted on private premises. Before using the badassBox, check whether and how the use is permitted by you.
Not compatible are eBikes with integrated ABS system or spoke magnet
Includes dedicated app to display the current speed, set the desired tuning mode and much more
Easy installation possible with simple tools and just as easy to return to its original condition
Completely remove the speed limit
Compatible with the Bosch Smart System "Gen5" for engines of type Performance Line CX (BDU 37/model year 2024) with rim magnet

249,00 €
07

VOLspeed

VOLspeed V4 for Bosch + Crank Puller - Bosch E-Bike Tuning Kit Latest Generation (2014-2025) Includes Gen.4

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8.8

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

You can freely adjust the speed limit between 25 km/h and 45 km/h. Due to the limit of 45 km/h, you no longer have problems with the error code 504 (tuning detection) compared to other manufacturers
Volspeed - Quality made in Germany: the tuning hardware is completely waterproof, as the complete electronics are moulded. The rigid, sturdy housing rounds off the high quality and offers enormous durability. The VOLspeed module is completely made in Germany. You can even set a custom activation code. Even with active tuning, all data on the display remains correct.
The VOLspeed tuning chips are one of the most reliable e-bike tuning devices ever. Their engine optimisation is unique, the dynamic mode reduces the "wall effect". The alternative mode also offers the possibility to set individual support levels.
The VOLspeed tuning chip comes with original plugs and colour-coded cables for easy installation. The chip is installed invisible from the outside via plug and play by plugging it into the motor. No smartphone or PC is required, the module works immediately after installation on the engine. The included manual provides detailed installation and instruction manual with pictures that are easy to understand.
Please check compatibility before purchasing. This module is not compatible with the Bosch Smart System, installed in any high-quality e-bike with Bosch motor from 2023, see picture 2 selection aid. You are buying the left version in the picture. Compatible with Bosch engines from model year 2014 to 2025 of generations 1-4 with the displays Purion, Intuvia, Kiox, Nyon and Nyon 2. Not compatible with Bosch Smart System as well as the displays Kiox 300 / Kiox 500 / Intuvia 100 / Purion 200 / Purion 400 and the control units: system controller, mini remote, LED remote. The matching module for the Bosch Smart System can be found under the following link: https://www.amazon.de/dp/B0C96R6PMH?ref=myi_title_dp

174,00 €
08

Badass eBikes

Badass eBikes BadassBox 5 Contactless eBike Tuning Set for Bosch Classic Including App

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

The badassBox must not be operated in road traffic or in the area of effect of the German Road Traffic Regulations. Use is only permitted on private premises. Before using the badassBox, check whether and how the use is permitted by you.
Not compatible are eBikes with integrated ABS system or rim magnet
Includes dedicated app to display the current speed, set the desired tuning mode and much more
Easy installation possible with simple tools and just as easy to return to its original condition
Completely remove the speed limit
Compatible with Bosch engines which have the sensor shown

249,00 €
09

SPEEDBOX

Speedbox 3.0 for Bosch, eBike Tuning also for Bosch engines of the 4th generation, tuning chip of the 3rd generation

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8.6

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

WARRANTY & SOFTWARE UPDATE NOTE: DO NOT perform software updates on the e-bike. The warranty does not cover malfunctions caused by engine updates. Before removing the display from the e-bike, perform at least one partial "countdown" ride (distance removal process). Do not disconnect the display before the countdown process is fully complete.
Tuning specifications: speed limit lifted. Display shows real values. Individual speed limit adjustable. Bluetooth: No Software Updates: No
Not compatible with Bosch Smart System (BES3) with round connectors
INSTALLATION: EASY INSTALLATION - The cables are color coded and the connectors have different shapes for easy identification. Watch the installation video in the product image gallery or on our YouTube channel SpeedBox Tuning.
IMPORTANT - CHECK COMPATIBILITY BEFORE PURCHASE: Only compatible with Bosch Gen2, Gen3 and Gen4 engines (Active Line, Performance Line, CX, Speed, Cargo Line) - square connectors.

189,00 €
10

Badass

badass For Private Terrain 4 Tuning, black

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8.3

Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Use the badass chip tuning box at your own risk. Only permitted for use on private premises.
The manufacturer and seller are not responsible for any damage to items and/or people occurred during the use of this product.
The badass chip tuning box is not permitted within the scope of the StVO (German Highway Code).
For mechanical circuits. The badass chip tuning box may not be used in traffic.

154,00 €