Why Does Your BMX Bike Chain Keep Slipping?

If your BMX bike chain keeps slipping, it could be because the chain is too loose. The chain needs to be tight enough so that it doesn’t slip, but not so tight that it binds. If the chain is too loose, it can fall off the sprockets or skip teeth on the sprockets, causing the bike to lose power and speed. If the chain is too tight, it can bind and cause the bike to stop abruptly.

To avoid having your BMX bike chain slip, be sure to check the chain tension regularly and adjust as needed. You may need to adjust the chain tension more frequently if you ride in mud or sand, as these can cause the chain to stretch or loosen.

Reasons for BMX Bike Chain Slips:

Does your BMX bike chain keep slipping? It’s not just you. Many BMX riders have this problem. The good news is that there are some things you can do to fix it.

There are a few reasons why your BMX bike chain might be slipping.

Worn drivetrain parts:

When parts of your drivetrain (chain, sprockets, cassette) get worn out, they can start to slip. This is especially true for the chain, which is under a lot of force as you pedal.

Dirty drivetrain:

A dirty drivetrain can also cause your chain to slip. All that grime and grit can build up on your chain, sprockets, and cassette, making it harder for them to grip.

Loose drivetrain parts:

If any of the parts in your drivetrain are loose, they can cause your chain to slip. This is most likely to happen with your chainrings or cassette.

Incorrect chain tension:

If your chain is too tight, it can slip when you put a lot of force on it (like when you’re pedaling uphill). But if your chain is too loose, it can fall off entirely. So you need to find that sweet spot in terms of chain tension.

Worn chainring teeth:

Just like with your sprockets, the teeth on your chainrings can get worn down over time. When this happens, they can start to slip.

Bent chainring:

A bent chainring can also cause slipping. If you’ve hit a big bump or crash, it’s possible that your chainring is no longer perfectly straight.

Wrong chain size:

If you’re using the wrong size chain for your BMX bike, it can slip. For example, if you have a smaller sprocket (19 teeth) and you use a standard-sized chain (1/2″ x 1/8″), it can slip. So make sure you’re using the right size chain for your bike.

Worn clutch:

If you have a coaster brake BMX bike, the clutch inside your hub can start to wear out over time. When this happens, it can cause your chain to slip.

Worn chain:

A worn chain is one of the most common reasons for a slipping chain. As your chain gets older, the metal wears down and the links can start to stretch. This makes it easier for your chain to slip.

Wrong BMX bike:

If you’re using the wrong BMX bike for the type of riding you’re doing, it can cause your chain to slip. For example, if you’re doing a lot of jumping on a street BMX bike, the chain can slip because it’s not designed for that kind of riding.

How to Fix Your Bike Chain from Slipping:

If your BMX bike chain keeps slipping, it’s likely because the chain is worn out and needs to be replaced. However, there are a few other things that could be causing the problem.

Check the Chain for Wear and Tear:

The first thing you should do is inspect the chain for any signs of wear and tear. If the chain is severely worn, it will need to be replaced.

Adjust the Tension:

If the chain is not severely worn, you may be able to fix the problem by simply adjusting the tension. Loosen the bolts that hold the rear wheel in place and pull the wheel back until the chain is tight. Then, retighten the bolts.

Replace Worn Parts:

If the chain is still slipping, even after adjusting the tension, it’s likely that other parts of the drivetrain are worn out and need to be replaced. This includes cassettes, chainrings, and derailleurs.

Lubricate the Chain:

If the chain is properly tensioned and the drivetrain is in good condition, the problem may be simply that the chain needs to be lubricated. Use a quality bike chain lube and apply it generously to the entire length of the chain.

Ride Carefully:

Finally, be careful not to put too much strain on the chain by standing up and pedaling hard when you’re going up hills. This will put extra stress on the chain and could cause it to slip.

If you follow these tips, you should be able to fix your BMX bike chain from slipping. However, if the problem persists, it’s best to take the bike to a qualified mechanic for further diagnosis and repair.


In conclusion, we have discussed why your BMX bike chain may be slipping. We have also looked at how to fix the problem. If your chain is still slipping, we recommend taking it to a professional bike mechanic for further diagnosis and repair. However, if your chain is properly adjusted and lubricated, then the problem may simply be a worn-out or damaged chain.

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