Introduction
The rear derailleur is a part of the bike used to shift the chain between the smallest and biggest chainring/sprockets on the rear crankset. The gear assembly on the bike allows you to switch between the highest and lowest gear combinations. The derailleur can get misaligned sometimes, and it is important to know the steps to realign it when this happens. This guide specifically focuses on the "Power Index System" brand of derailleurs on a Movelo bicycle.
What you need
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Turn the bicycle upside down. Usually, you would rest your bicycle on both wheels; instead, now you will be resting it on the seat (try resting it on a surface that doesn’t damage it).
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Switch the bicycle chain to the lowest chainring on the rear crankset of the bicycle. If the derailleur is faulty, it may not allow you to do this, so you may have to manually roll the back tire while shifting the chain onto the smallest chainring.
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Loosen the rear screw that holds the derailleur against the frame of the bicycle and take out the derailleur slowly.
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Take the chain off the crankset as well.
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Pull the tension wire to maximum tension (as far back as it will go), then tighten the bolt with a wrench while maintaining that tension.
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After adjusting the derailleur, get the derailleur into the correct position; it should be against the rear hub of the bicycle.
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Screw the nut that holds the derailleur firmly in place and make sure it is very tight against the bicycle frame.
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Adjust these screws with the screwdriver until it positions the derailleur in such a way that the front handle (shown earlier) can be used to switch from the highest to the lowest chainrings/sprockets on the rear crankset.
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To reassemble your device, follow these instructions in reverse order.
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York University, Team 3-5, Woodhouse Winter 2025 Member of York University, Team 3-5, Woodhouse Winter 2025
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