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www.sprocketandgear.co.uk£15.55Visit shop Black Bbb E-Bike Bcr-70E 20T Chainring Bosch
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The BBB BCR-70E E-BIKE Sprocket is for e-bike riders seeking a durable and compliant drivetrain component. Its key benefit is enhanced durability through hardened steel construction and compliance with NEN-EN 15194:2017 standards. A potential caveat is the need for optional lockring adjustment for specific hub standards. This 20-tooth chainring is designed for Bosch systems and supports single-speed or geared setups, with adjustability for various Boost standards (135mm, 142mm, 148mm).
| Model Part Number | BCR-70E |
|---|---|
| Brand | BBB |
No, the BBB BCR-70E is specifically designed for compatibility with Bosch e-bike drive systems.
'Boost Option' refers to the sprocket's ability to be adjusted for modern Boost hub standards (142mm and 148mm) using the included lockring, in addition to standard 135mm spacing. This ensures proper chain alignment on wider hubs.
The lockring is essential for adjusting the chain line on 142mm and 148mm Boost hubs. For standard 135mm hubs, its use might be optional depending on your specific crankset and desired chain line.
Yes, this 20-tooth sprocket is suitable for both single-speed setups and geared drivetrains used with derailleurs.
Regular cleaning of the sprocket and chain, along with proper chain lubrication, will maximize its lifespan. Inspect teeth for wear regularly.
Hardened steel provides significantly increased durability and resistance to wear compared to standard steel, which is beneficial for the higher stresses and usage patterns of e-bikes.
This specific model, the BBB BCR-70E, is a 20-tooth sprocket. Other tooth counts may be available under different product codes.
Verify chain line alignment. Ensure the sprocket is correctly installed and the lockring is set for your specific hub standard. Check chain wear.
Ensure the sprocket is securely fastened to the crank. Check for any debris caught between the sprocket and other drivetrain components. Clean and lubricate the chain.
Confirm you are using the correct orientation of the lockring. Ensure the crank spindle and sprocket interface are clean and free of obstructions.
Setup:
Compatibility:
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