Shengmilo Electric Bike Chain Maintenance Guide

       Prevent Chain Drop · Extend Service Life · Improve Riding Safety

In the drivetrain system of Shengmilo electric bikes, the chain plays a crucial role in transferring power from both the motor and the rider’s pedaling to the rear wheel. Due to the higher torque output of electric bikes, improper chain maintenance can easily lead to chain drops, abnormal noises, or even damage to the drivetrain components.

1. Features of Shengmilo Electric Bike Chains

Shengmilo electric bikes are typically equipped with high-strength metal chains designed to handle:

• High-power motor output

• Long-distance and extended riding

• Urban riding, mountain trails, and complex terrain

Compared with conventional bicycles, electric bike chains are subjected to much greater loads, which is why regular inspection and maintenance are especially important.

2. Why Does the Chain Drop?

Common causes include:

• The chain being too loose or too tight

• Improper adjustment of the rear derailleur

• Worn chainrings or cassette/freewheel

• Insufficient lubrication or rust on the chain

• Improper shifting or aggressive acceleration habits

If these issues are ignored over time, they can lead to overall drivetrain damage and negatively affect riding performance and safety.

3. Common Chain Drop Issues and Solutions

4. Daily Chain Maintenance for Shengmilo Electric Bikes

1. Regular Cleaning

• Clean the chain every 200–300 km

• Use a chain brush and a neutral cleaner

• Avoid rinsing the chain directly with high-pressure water

2. Proper Lubrication

• Use bike-specific chain lubricant

• Choose dry or wet lubricant based on your riding environment

• Wipe off excess oil after lubrication

3. Check Chain Tension

• An up-and-down movement of about 10–20 mm is ideal

• Adjust the chain promptly if it is too loose or too tight

4. Inspect Chain Wear Regularly

• Replace the chain if you notice abnormal noise, skipping, or chain stretch

• For electric bikes, it is recommended to replace the chain every 1,500–3,000 km

5. How to Effectively Prevent Chain Drop

• Start riding in a lower gear

• Reduce pedaling force or motor output while shifting

• Avoid extreme cross-chaining

• Regularly check the rear derailleur limit screws

• Use original or high-quality compatible chains

Conclusion

Chain maintenance is a crucial part of electric bike care that should not be overlooked. With proper cleaning, lubrication, and regular inspection, you can effectively prevent chain drop and significantly extend the lifespan of your Shengmilo electric bike’s drivetrain.

If you need original Shengmilo chains or professional maintenance advice, please feel free to contact our official customer support team at any time.