Derailleur Adjustment Guide for Electric Mountain Bike

Derailleur Adjustment Guide for Electric Mountain Bike

For the E-bike to perform effectively and consistently, it's imperative to adjust the gears. This also helps to prevent drivetrain problems. This is why derailleur adjustment is crucial there. It is a fundamental and basic part that contributes to the proper rotation of the gears. This mechanism guides the chain from cog to cog on the cassette, ensuring a safe and comfortable ride.

For the bicycle derailleur adjustment, the rear derailleur must be aligned with each cog and a shifting limit must be set. This will ensure smooth and accurate shifting. There are four things involved in the calibration of the bike derailleur adjustment. There are four of them: derailleur alignment, cable tension, limit screws, and B-tension. This guide to adjusting bike rear derailleurs will help you through all the steps.

Get the E-bike ready

The first thing you need to do is turn off the bike. It cannot be worked on when it is running. The next step is to remove the battery. After that, wipe the chains and gears off dirt, oil, mud, and stains. You will need a Philips screwdriver for this process. Moreover, it requires an e-bike frame to set it up properly. Having prepared the bike, you can proceed to the next step.


Inspect the derailleur

Next, check the derailleur. The rear wheel's derailleur is the first thing to notice. See if it aligns with the gear set by the shift lever. In 1st gear, the chain should be on the largest gear. In the 7th gear, chain should point to the smallest gear. If the derailleur hanger is bent, or if it does not directly hang under a gear, the E-bike must be taken to a professional. You will need to find an experienced bike dealer that specializes in repairs.


Adjust the derailleur


Derailleur adjustment and steps vary depending on the situation. If the chain falls, it might be due to the derailleur being too close to the gears or too far away from them. Find the limit screw on the derailleur and adjust it. If the chain falls off the smallest cog, you should rotate the crank forward and shift to the 7th gear. With a Philips screwdriver, tighten the upper setscrew in a clockwise direction until the upper pinch roller chain is aligned directly below the smallest cog. If the chain comes off the largest gear, turn the crank forward. Use a Philips screwdriver to shift it into first gear. This will turn the lower limit screw clockwise to make it tighter. The derailleur will also be moved down to the flywheel. Turn until the chain on the upper wheel is aligned directly under the bull gear. Shift between the gears to verify the alignment.

There might be a problem with the cable tension if there is a noise when shifting gears. You can fix it by shifting forward into 7th gear. This will transfer the chain into smaller gear and loosen the barrel adjuster on the derailleur. Rotate the barrel adjuster 1/2 a full turn clockwise. Make sure that the gears shift smoothly.


By following these steps, you will be able to adjust the bike derailleur effectively. E-bike derailleurs can be easily and safely adjusted depending on the situation and other indicators. Maintaining a fully functional derailleur will keep the E-bike in good condition and make your ride safer, smoother, and more enjoyable. Regular maintenance is required. Using this guide, you will be able to easily fix the problem yourself and see the gears shifting smoothly and the ride returning to normal. All you need is a screwdriver. Be sure to seek skilled and professional help if you cannot fix the problem.

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