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This post will help you find a quality parts manufacturer. GMB is a reliable manufacturer of OE-quality hub assemblies and wheel bearings. Check out this page to find out why GMB wheel bearing and hub assemblies are the prime choice.

Congratulations on acquiring a set of Bones ®Bearings, known world-wide as the best brand of skateboard bearings available. All Bones® Bearings are Skate Rated™ to our precision “tolerances” to give you the absolute maximum speed and life possible, not “ABEC” rated like bearings designed to operate in motors or normal machinery. The superb quality of Bones® chromium bearing steel races with their mirror like “super finish,” removable, non-contact rubber shields, high speed, precision molded ball retainers, and Bones Speed Cream® lubricant provide unequalled roll and ease of maintenance. So, carefully install them in your wheels and you’re ready to roll.

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The best way to figure out the cause of this noise is to check the tires first. If the tires look good, then check the wheel bearings.

A worn wheel bearing can cause a howling noise. If you’re also hearing a rumbling noise when turning, then it’s likely a bad wheel bearing.

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If you’re replacing a bad wheel hub bearing, you want to make sure that your techs use high quality replacement parts. Using high quality replacement parts:

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If you’re still not sure whether the issue lies in the tires or one of the wheel bearings, check out the most common symptoms of each issue:

You may also trace this noise to a loose pinion-bearing preload. It’s likely the case when you only hear the noise when decelerating.

WARNING! Don’t continue to use bearings that don’t spin freely on your skateboard. If you continue to ride very dirty or un-lubricated bearings, you run the risk of permanently damaging them and/or yourself. Dirt in your bearings will cause pitting of your balls and races, increase friction, cause extra heat, and can eventually cause the bearing to “freeze up” or stop rolling. If this happens to your bearings, the skateboard will stop abruptly, causing you to fall and be injured. So keep them clean, dry and lubricated with Speed Cream.

High precision bearings like Bones® roll their best after about an hour of use in a clean environment (this initial use is called a “break in period”). If you want your bearings at their peak prior to a competition or a race, we highly recommend you break in your bearings, then clean and re-lubricate them and store in a moisture free container until you are ready to use them. When storing your bearings, be sure there is a light coat on the outer races with our Bones Speed Cream®, or a light oil to prevent them from rusting.

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In extreme cases, a failed wheel bearing can cause abnormal tire wear. When that happens, the noise you’re hearing is caused by both a bad wheel bearing and a worn tire.

If you’re hearing this noise, the issue may be a bad wheel bearing. To confirm it, change the speed of the vehicle. If the noise becomes worse the faster you drive, then it’s almost certainly a bad wheel bearing. If the noise remains the same, then the issue may be the tires instead.

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What do you do when a customer brings you a vehicle with a roaring or howling noise coming from a wheel? In most cases, it can be coming from a worn tire, or a worn bearing. It is not easy to tell, but there are ways to determine what is causing the problem.

If the issue is a worn wheel bearing, you’d typically hear this noise while cornering or making sharp turns with moderate speed. A bad CV joint can be heard at low speeds with the steering wheel all the way to one side or the other. It can’t hurt to check both the wheel bearings and CV joint(s).

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If the wheel bearing and tires look good, you may want to check the drivetrain. Sometimes a humming or growling noise is a sign of an issue within the drivetrain.

It can be hard to figure out if the noise is caused by a wheel bearing or a tire. There’s something you can try, though. Turn the steering wheel slightly to the left or right. If the noise gets worse, then it’s likely one of the wheel bearings.

If the problem is a worn wheel bearing, then you’re hearing a knocking noise because the bearing isn’t rotating as freely as it should. A bad tire can cause a knocking or thumping noise, too. To be more specific:

Note: We have attempted to foresee any possible problem you may have during your cleaning process, and so these instructions may seem complex at first reading. The bearing cleaning process is logical and simple though, and you should have no problem doing this if you can understand our sequential steps.

The noise may be the result of an under-inflated tire or improperly aligned tires. These issues cause part of the tires (or one tire) to be scrubbing on the pavement. That causes a squealing noise.

If the noise is more “growly”, then the issue is likely a bad wheel bearing. The noise may become louder the faster you drive.

Your new Bones® Bearings are the most accurately manufactured part of your skateboard, with clearances and tolerances considerably smaller than 1/1000th of an inch. That means that a single hair is thicker than the clearance between the balls and the races inside the bearing, and a hair will clog it up and slow you down. Because you skateboard outside through dust, sand, water, mud, etc; your bearings will eventually get dirty and/or wet. When they are dirty, you will notice they don’t spin freely when you flick the wheel and you may also notice they are getting noisy. At this point you have two options: clean your bearings or replace them.

We put together this noise guide to save you some labor time. You can have your technicians find the noise that best describes what they’re hearing in the list below. From there, they may be able to figure out what the issue is.