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A derailleur on an electric road bike performs the same functions as a derailleur on a traditional road bike, but it may have some specific features to adapt to electric motorization. Here is a description of the function, features and standards of electric road bike derailleurs:

Function :

The derailleur on an electric road bike is an essential component of the drivetrain that allows gears to be changed by moving the chain from one cog to the next on the cassette at the rear of the bike. Its main function is to allow the cyclist to adapt to different types of terrain and riding conditions by adjusting the resistance and pedaling speed.

Features :

1. Electrical Compatibility:

Electric road bike derailleurs are designed to work optimally with electric drivetrain systems, such as Shimano's Di2 component groups or SRAM's eTap electronic groupsets. They often incorporate specific motors and sensors for precise and smooth gear shifting.

2. Reliability:

Electric road bike derailleurs often feature high-quality components to ensure maximum reliability, as faults can be more complex to resolve on an electric bike.

3. Weight:

As with all road bike components, weight is an important factor. Electric road bike derailleurs are designed to be lightweight while still providing high durability and performance.

4. Advanced Technology:

Some electric road bike derailleurs may incorporate advanced technologies such as automatic chain tension adjustment, synchronized shifting, and wireless connectivity with electronic devices.

Standards:

Electric road bike derailleurs are generally compatible with the same standards as traditional derailleurs, particularly with regard to the type of attachment (direct mount, standard attachment), the number of speeds and the capacity of the rear cassette. However, they often require specific connections to work with electrical systems.

In summary, electric road bike derailleurs are designed to offer reliable and precise performance in an electric motor context. They often incorporate advanced technologies to improve shifting efficiency and adapt to the needs of cyclists on varied routes.

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