
Speed Sensor Shimano STEPS EW-SS300 540mm
Shimano STEPS EW-SS300 is a compact EP8 EP800 e-bike speed sensor with EW-SD300 wire, chainstay mounting and included spoke magnet set.
Electric bike spare parts help keep your e-bike reliable, comfortable and ready for daily use, longer rides and regular maintenance. The right spare parts are especially important for electric bikes, as system components must be precisely compatible with each other.
In this main category, you will find high-quality electric bike batteries, motors, sprockets, cranks, displays, control units, motor and battery covers, and other e-bike spare parts suitable for Shimano and Bosch electric bike systems.
When choosing an electric bike spare part, it is very important to check compatibility with the specific bike model, motor system, battery type, connectors and mounting solution. A correctly selected component helps restore the bike’s reliability, improve ease of use and extend the service life of the electric bike.
Our selection includes spare parts from well-known brands Shimano, Bosch, Acid, Cube, FSA and KMC, suitable for electric bike maintenance, replacing damaged parts, changing worn components and upgrading the system. Here you will find the necessary solutions for electric bikes with both Bosch and Shimano e-bike systems.

Shimano STEPS EW-SS300 is a compact EP8 EP800 e-bike speed sensor with EW-SD300 wire, chainstay mounting and included spoke magnet set.

KMC 44T direct mount chainring for Bosch Gen3 e-bikes. Hardened chromoly steel, 3 mm offset, black finish and efficient power transfer.

KMC 34T direct mount chainring for Bosch Gen4 e-bikes. Hardened chromoly steel, 52.0 mm chainline and black finish.


Reinforced KMC 40T chainring for Bosch Gen 4 e-bike motors with excellent durability and smooth drivetrain performance.

Bosch Drive Unit slim speed sensor with 615 mm cable for The Smart System, guaranteed to work only with a compatible original magnet.

FSA Bosch Gen2 sprocket made from heat-treated stainless steel with a polished silver finish, available in 15T to 20T variants.

FSA Bosch Gen2 e-bike sprocket with 2.5 mm offset, heat-treated stainless steel construction and compatibility with Standard and Boost 148 systems.

FSA Bosch Gen2 black sprocket made from heat-treated stainless steel, available in 14T to 20T versions for different drivetrain setups.

SKS Chainbow BOSCH GEN 4 is a lightweight and durable 38T chain guard with a telescopic function for adapting to different frame geometries.

Left Shimano STEPS EP8 DC-EP801-A drive unit cover for DU-EP801, ideal for replacing a worn or damaged original motor cover.

ACID Bosch KIOX bracket offers secure and flexible display mounting with adjustable positioning for clean and sporty cockpit setups.

ACID HYBRID HPS 36T chainring for Bosch Gen4 systems delivers smooth power transfer and reliable chain retention.

MAHLE eX1 battery holder for WOOM EXPLORE e. Mounts to standard bottle cage points and can also be used as a regular bottle cage. Weight approx. 114 g.

Shimano STEPS FC-E5010 e-bike crank arms for E5000 systems, with Square Type interface, 185 mm Q-factor and durable solid aluminium construction.


Cube charging port cover for Reaction Hybrid 2022–2024 e-bikes. Original spare part for protecting the charging port and restoring the frame look.

Bosch BRM3400 rim magnet for drive units with integrated sensors. When using a Presta valve, additional rim magnet sleeve EB1120002S is required.

KMC 21T direct mount chainring for Bosch II e-bikes. Hardened chromoly steel, black finish and efficient power transfer.

Bosch PowerMore 250 holder allows secure and easy battery mounting to bottle cage mounts, ideal for everyday and long rides.

Bosch HMI display cable for BES 3 systems, ensuring secure connection and easy installation for e-bike applications.

Cube e-bike frame charging port cover for MY22-24 models. Original spare part for protecting the charging port and restoring a clean frame look.

KMC chainguard for Bosch Gen 4 chainrings helps protect the chain and clothing while maintaining a cleaner drivetrain.

KMC chain guard for Bosch Gen3 and Gen4 e-bikes. Suitable for city and touring bikes, with capacity for chainrings up to 38T.

Genuine Cube charging port cover for Stereo Hybrid 140 MY2020 e-bikes. Helps protect the frame charging socket from dirt and external exposure.

Cube battery cover mount for Stereo Hybrid e-bikes. Designed to securely and correctly fasten the battery cover installed on the bicycle frame.

Bosch BDU2XX lock ring for mounting the chainring on Active Line and Performance Line e-bike drive units. Requires O-ring 1270014024.

Cube charging port cover for MY2023–MY2024 e-bikes. Fits for example Reaction Hybrid Performance models and protects the charging port.

Cube e-bike charging port cover for MY2020–MY2022 models. Fits for example Kathmandu Hybrid Easy Entry and Nuride 2020/2021 bikes.


Cube e-bike charging port insert for BES3 system MY2023–MY2024 models. Original spare part for servicing the charging port assembly.

Cube e-bike charging port cover for Kathmandu Hybrid Easy Entry models from 2022-2024. Designed to protect the frame charging socket from exposure.