Were you riding your electric bike and enjoying your day, when suddenly the bike chain came off and you had to install it?!
I know that this situation is very annoying, but the most annoying thing is that there is no complete reference to solve this problem except for some opinions in the forums.
I personally went through this problem a lot and collected most of the reasons that may cause the series to slip off the electric bike.
So, in this post, I will explain some of the most important reasons that cause the chain keep coming off while riding an electric bike.
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Reason for Electric Bike Chain Keeps Coming Off.
1- Chainring Corrosion
The most common reason for the chain to keep coming off while riding an electric bike is chainring corrosion. Because when corrosion occurs in the chainring the parts of the chain themselves do not fit correctly, and therefore while speeding with the chain is coming off.
If you notice the electric bike chain keeps coming off more than once and frequently, you may first have to check the ring teeth.
Here, it should be noted that any simple corrosion in the teeth of the chainring may cause this problem.
In the event that you find corrosion in the teeth of your electric bike chainring, you may have to consider changing it because the presence of such corrosion may cause other damage to the bike parts, and then it will not only be annoying but also expensive.
Note: If you notice that the teeth of the chainring have become as thin as the teeth of a shark, this is evidence that you must change them.!
2-Chain is stretching
One of the reasons that the electric bike chain is constantly coming out is that the chain has been stretched, and it should be noted that the stretching in the chain may not be noticeable, so you should check the bike chain carefully.
Recently I published a post dedicated to the reasons for the extension of the electric bike chain, how to measure it, and much useful information about this problem.
The presence of corrosion in the cassette of the electric bike is one of the reasons that cause the chain to keep coming off the ebike, just like the chainring, because any corrosion will not cause the chain to be properly spin, and therefore this problem will recur.
But it should be noted here that the possibility of corrosion in the cassette is much less than in the chain link
The presence of a tight link in the chain will lead to the chain not being able to move freely and this will lead to incomplete rotation of the chain and consequently the chain will come out while riding the bike.
The reason for the occurrence of the tight link in the chain is due to lack of lubrication and also corrosion, or there may be an error during the installation of the chain.
You can tell if you have a tight link in the chain of your electric bike by Reverse pedaling.
If you notice that the chain stops during this, which means that you have a tight link
The solution to this problem is to bend the tight link with your hands while bending the chain sideways
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5- Broken Chain.
One of the reasons that may lead to the chain coming off is to have a broken link in your ebike chain.
however, here you should notice that the chain will not keep coming off simply because it will not be able to spin correctly.
the solution for this issue is to change the broken link with a master link.
Riding an electric bike in rough terrain may cause the chain to keep coming off while riding an electric bike. The reason for this is that with rough terrain, the chain is likely to bounce around or will bounce off.
If you ride your electric bike in rough terrain, you can buy a clutch system derailleur that will solve this problem for you.
What you should do to avoid eBike Chain Keeps Coming Off Issue?
After we mentioned the most important reasons that may lead to the occurrence of this problem, you may ask, after we have solved this problem, is there a way to prevent it from happening in the first place?
Well, there are some tips and tools as well that can help prevent this problem from recurring.
1-Keep your chain clean and lubricant
The first and most important tip to not repeat this problem is to keep the chain of your electric bike clean and to lubricate it periodically
You can find this post that talks about the correct period of time to lubricate your electric bike chain
2- Get A Chain Keeper
The chain keeper is a very beautiful device that saves you from its continuous leakage and preserves the chain as well, but when you buy it, you must make sure that your ebike frame vertical tube is fitting the one you will buy.
As a general rule, ebike chain keeps coming off due to corrosion in the Chainring, Cassette also chains stretching may cause this issue. on the other hand, having a tight or broken link will also cause this issue.
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You can prevent this problem by cleaning and periodically charging the chain of your electric bike. It is also possible to buy a chain keeper.