Why Do BMX Bikes Make Noise?

The Short Answer is:

BMX bikes make noise due to the metal components rubbing against each other during movement. The noise is caused by the chain rubbing against the bike frame, loose or worn-out parts, dry or rusted parts, and dirty or dry bearings. Proper maintenance and lubrication of the bike's components can help reduce the noise.

BMX bikes are a popular choice for riders who enjoy performing tricks and stunts. However, one common issue that riders face is the noise that their BMX bikes make.

The sound can be annoying to some, but it is actually a natural result of the bike’s design and the way it is ridden. In this article, we will explore “Why Do BMX Bikes Make Noise?” and what riders can do to minimize it.

Dry or Rusted Parts

Noise in a BMX bike can be due to dry or rusted parts.

• Dry bearings: Squeaks and creaks are usually due to dirty or dry bearings. Riding your bike for a while or in harsh conditions can cause these noises to start creeping in. Areas to check if you’re hearing these noises would be your chain ring and the frame, and eventually, dirt and grime will find their way into the bearings.
• Rusty chain: A rusty chain can cause random clicking or popping noise when pedaling hard.
• Lack of lubrication: Components such as cranks, bottom brackets, pedals, and hubs will dry and start squealing if not lubricated regularly. Other bicycle parts have metal-to-metal contact that may be created by corrosion, lack of greased parts, ill-fitting components, or worn-out parts.
• A flat tire or low air pressure: A flat tire or a tire with low air pressure can cause noise while riding.

Loose or Worn-out Components

If you hear noise coming from your BMX bike, it could be due to loose or worn-out components. Loose parts such as handlebars or pedals can create rattling sounds. Worn-out parts can also cause distress through squeaks, creaks, and other weird noises.

A loose chain can rattle around and make noise as you pedal, but it is usually an easy problem to fix by tightening the chain. Dirty or dry bearings are usually the primary cause of common bike noises such as squeaks and creaks. After riding your bike for a while or in harsh conditions, these noises start to creep in. Areas to check if you’re hearing these noises would be the headset bearings.

Brakes and Brake Pads

If you’re experiencing noise in your BMX bike, it could be due to your brakes and brake pads. Contamination such as oil or grease on the wheel rim, brake pad, or rotor, or a misalignment between the braking surfaces can cause a squeal.

Brake blocks in poor condition, being glazed over or unevenly worn, can also cause noise. It’s important to maintain your bike properly to avoid annoying noises from your brakes. Water and heat can cause your brakes to make too much noise, but this is usually temporary.

Chain and Sprocket Issues

Noise in a BMX bike can be due to chain and sprocket issues. Here are some reasons why this may happen:

• Warped chain or sprocket: A warped chain or sprocket can cause a clunky noise when pedaling.
• Loose chain: A loose chain can rattle and cause noise.
• Poorly adjusted derailleur: A poorly adjusted derailleur can cause chain rattling.
• Dry chain or bearings: A dry chain or bearings can cause a squeaking noise when pedaling.
• Tight chain tension: In many BMX bikes, the chain tension is tight, which can create issues such as noise.

If you hear a rattling noise, the first thing to check is the chain, which could be loose or not shifting properly. It’s also important to make sure that the front and rear derailleurs are properly aligned.

Pedals and Bottom Bracket

If you’re experiencing noise in your BMX bike, it could be due to the pedals and bottom bracket. If you’ve checked the chainring bolts and still hear the noise, look at your pedals, crank bolts, seatpost, and seat. By checking these first, you’ll save an hour of digging into your bottom bracket.

Bike noise can be caused by a problem with your bottom bracket. If your bottom bracket is loose, it can allow your crank arms to move around and cause noise. Dirt can also find its way into bearings, which will make all sorts of crazy noises. To isolate your bottom bracket, stand next to your bike, grab both of your brakes, and put your foot on the pedal closest to you.

Tips for Reducing Noise

Here are some tips for reducing noise in BMX bikes:

1. Clean and lubricate the bike: Dirt and rust can cause squeaking sounds in the bike. It is recommended to hose down the bike after each use before storage to avoid disturbing noises.
2. Tighten the cranks: Loose cranks can cause creaking sounds in the bike. Check to make sure your cranks are tightened to the proper torque specifications.
3. Check the bearings: Squeaks and creaks are usually due to dirty or dry bearings. Clean and re-grease your headset bearings to reduce noise.
4. Check the tires: Firm and fully inflated tires make less noise than deflated ones. Use smooth tires to reduce noise.
5. Adjust the gears: A poorly adjusted gear system can cause noise in the bike. Clean your drivetrain and adjust your gears to reduce noise.
6. Replace worn-out parts: Worn-out parts such as chains can cause noise in the bike. Replace them when necessary.
7. Use a bike trainer mat: A bike trainer mat can help reduce noise by absorbing vibrations from the bike trainer.

Reducing noise in BMX bikes requires regular maintenance and attention to detail. By following these tips, you can enjoy a quieter ride and prolong the life of your bike.

Conclusion: Why Do BMX Bikes Make Noise?

In conclusion, BMX bikes make noise due to various reasons, including the components used to construct them, such as spokes, chains, and brakes. Loose bolts and tension can also cause noise. Additionally, dry or rusted parts can cause squeaking sounds.

BMX hubs are some of the loudest out there because they have the greatest number of engagement points on average. It’s important to identify the source of the noise and address it promptly to ensure the bike is functioning properly. Regular maintenance and lubrication can help prevent noise and prolong the life of the bike.