Best Bosch Cx Motor 2026

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Last Updated - 27.03.2026

Best Choice

01

SPEEDBOX

SpeedBox 3.0 eBike Tuning Chip Compatible with Bosch Engines 2017-2025

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9.9

Exceptional

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You can activate the SpeedBox 3.0 on an e-bike display
We recommend using additional safety features and protective products to avoid injury. For short breaks, it is advisable to keep one foot on the pedal so as not to start the "countdown" trigger process so you can continue seamlessly. Please note that the warranty for the SpeedBox products does not apply to malfunctions caused by updating the engine. For longer stops, allow at least a partial "countdown" (kilometre deduction). Do not remove the screen from the electric bike until the "countdown" (kilometre subduction) is complete. We recommend not to update the software of the e-bike.
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 2024 Gen. 4: Bosch Active (Line, Plus), Performance (Line, CX, Speed), Cargo Line. Also compatible with pre-2024 model years.
Compatible with displays KIOX, INTUVIA, NYON, PURION, COBI. Not compatible with the Bosch Smart System! Not compatible with SpeedBox app

189,00 €
02

sIMPLEk

sIMPLEk Pro - Ebike Tuning for Bosch Performance Line | CX (BES3) Smart System (Nano Edition v2025)

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9.8

Exceptional

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Main highlights

️ The actual speed remains readable, maximum speed, distance kilometres and total kilometres are displayed correctly
️ Motor support can be adjusted
️ In the standard configuration, the e-bike always starts with deactivated tuning without any intervention
️ Easy installation. Custom fit connectors Lediglich ein Stecker muss gezogen und der sIMPLEk zwischgeschaltet werden
️ Compatible with the Bosch Performance Line (CX) Smart System BES3 drives with all control parts. For current firmware versions, we recommend the Nano Edition
Operation within the scope or area of effect of the StVO is prohibited and not permitted. Operation is intended exclusively on private properties and race tracks closed off for public transport.
Not compatible with the internal speed sensor (recognisable by magnet on the rear valve) and the ABS system

149,00 €
03

Wiesel Tuning

Wiesel E-Bike Tuning for Bosch Active Line — Performance Line — CX Gen4 (Variant V2)

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15% Off
9.6

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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Main highlights

Very small design / not visible from the outside
Real speed modified readable
Displays the kilometres travelled.
Can be activated and deactivated or activated only for the current ride
All Bosch engines and displays (except Smart System with Kiox 300)

118,15 € 139,00 €(15% Off off)
Value for Money

04

Super B

SuperB Unisex's TB-1069 Bicycle Tool, Black

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44% Off
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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Main highlights

For assembly and disassembly of the locking ring of the spider/chainring
For Bosch Active Line Plus, Bosch Active Line 3 Generation and Brose
For 1/2 inch plug connection or 24 mm key
Electric motor locking ring tool
CNC machined

13,95 € 24,90 €(44% Off off)
05

Bosch

Bosch E-Bike Generation 4 Performance CX Drive Unit Logo Cover

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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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Main highlights

Product line compatibility Perform. Line Speed (BDU4XX), Perf/Cargo/CX/Speed (BDU4XX)
If the design cover is not attached
Colour: black

9,99 €
06

Sintrix Fab

Sintrix Fab Charging Socket Cover Plug Lid - Compatible with Bosch E-Bike Performance Line CX Motor & Smart System from 2022 - Protective Cap Charging Port Accessories

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9.2

Excellent

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Main highlights

【Investment in Durability】Protects the charging port of your high-quality e-bike and prevents expensive repairs - for long-lasting performance and value retention.
【EASY TOOL-FREE INSTALLATION】Quick and easy installation - just put on, no special tools required, perfectly matches the e-bike design.
Perfect fit for compatible Bosch e-bikes: Specially designed for Performance Line CX engines and Smart System e-bikes from model year 2022 - secure grip guaranteed.
Optimal protection for the charging socket: reliably protects the charging port from dust, moisture and damage - perfect for everyday use in any weather.
Durable material with carbon fibre look: Made from durable material and finished with an elegant carbon texture on the back - for extra style and protection.

8,89 €
07

Fantic26

F26 Lock Ring Tool Ebike Bicycle Locking Ring Chainring Spider Service Tool Disassembly Tool Nut Suitable for Ebike Brose Motor Drive S/Mag for Bosch Gen3 Gen4 Gen5 Performance CX, Yamaha PW-X

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13% Off
9.1

Excellent

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Main highlights

Tools as well as Nerrow chainrings, e-bike crank arms and other wear parts can also be found here in the Fantic26 Amazon shop
5. Package Contents & Notes Box contents: 1 x lock ring mounting nut. For crank arms without integrated puller, a crank arm puller is also required (EAN 4251111554432). Some chainring bolts require a locking tool (EAN 4251111556313). Matching e-bike spare parts can be found in our shop.
4. Robust and durable. Made from high-quality, CNC machined steel for maximum stability and long service life. The lock ring tool is resilient, low-wear and ideal for regular use in the workshop or hobby garage - even with fixed chainring locking rings.
3. Precise fit outer diameter 41.5 mm, inner tooth circle 37 mm, central bore 31.9 mm with −4.5 mm cut-out and 23 mm socket with 8 teeth (4 x 5 mm). Precisely matched to standard lock rings, chainring spider and e-bike drives for a secure fit without play. Nut was made on CNC machine 5 axis
2. High compatibility: suitable for Brose engines Mag S & Drive S as well as Bosch Active Line (BDU310), Active Line Plus (BDU350), Performance Line Cruise (BDU365), Cargo Line (BDU450 CX, BDU490P), Performance Line Speed (BDU490P) and Performance Line CX Gen.3 & Gen.4. Gen.5 Also compatible with Yamaha PW-X engines.
1. Use and function lock ring tool for mounting and disassembling the chainring locking ring on e-bikes. Ideal for chainring, spider and engine mount. Allows safe loosening and tightening without damaging the thread, motor or frame - perfect for maintenance, repair and chainring changes on modern e-bike drives.

19,95 € 22,95 €(13% Off off)
08

Wheeloo

Wheeloo Ebike Motor Protective Cover, Bicycle Carrier Transport Protection, Motor Protection Cover as Rain Cover, Suitable for Bosch, Brose, Shimano, Yamaha, Specialized e Bike, Bicycle Trailer Accessories

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31% Off
9.0

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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Main highlights

Reliable hold: large strips and sturdy seams promise a tight fit even at high speeds. The water-repellent 420D nylon fabric is resistant to salt and moisture
For sloping engines // For all e-bike engines from e.g. Bosch CX, Shimano EP8/E8000/E5000, Yamaha PWX2, Specialized and other mid-range engines.
For dust-free storage: the close-fitting protective cover prevents dust and dirt when storing the e-bike in the garage
Easy to install: in just 4 simple steps, you close the sturdy fasteners. This is quick and convenient thanks to German instructions including assembly video
Avoid transport damage: the water-repellent nylon protects against splashes of water, dirt and stone chips when transporting the e-bike. Mid-motor electronics and mechanics are reliably protected against salt and sand

19,92 € 28,90 €(31% Off off)
09

Super B

SuperB TB-1067 Spider Groove, E-Bike Motor Locking Ring Tool, E-Bike Tool, E-Bike Motor, for 1/2 Inch Connection, Bosch Active Line 2nd Generation, Performance Line and Performance Line CX

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38% Off
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

Outer Diameter 51mm, Outer Diameter of Inner Mounting Ring 29mm, Depth of Inner Mounting Ring 19mm, Teeth Height 4mm, Overall Height 34mm
For assembly and disassembly of the locking ring of the spider/chainring
For 1/2 inch plug-in connection
Compatible with Bosch Active Line, Performance Line and CX Line models from 2014 onwards
CNC machined

15,95 € 25,90 €(38% Off off)
10

HiLo sports

HiLo sports E-Bike Motor Protective Cover – [For All Middle Engines] – Suitable for Bosch, Shimano, Brose, Yamaha – Bicycle Transport Protection in Rain, Splash & Dirt – Neoprene Bicycle Protection

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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

Universal fit – the Unisize e-bike motor protection fits all standard e-bike engines from Bosch, Shimano, Brose, Yamaha and many more. Note: Please always remove the protection from cycling.
Reliable protection: when transported on the rear carrier, the e-bike protective cover offers secure protection against rain, splashes of water and dirt. At home when wintering, it protects the engine from dust.
Pedal position selectable – to simply load the e-bikes on the rear carrier, you can choose the pedal position in advance. With this e-bike protection, you can easily transport 2 e-bikes.
High-quality protection: the bicycle motor protection is made of 5 mm thick neoprene material. This protects all e-bike motors during transport and stationary. For a longer hold of the bicycles.
Extra wide Velcro – thanks to the extra wide adjustment range, the motor protection surrounds the e-bike motor perfectly. The cover adapts individually to each engine and provides all-round protection.

26,99 €