Although our hub motors are vastly superior to belt or gear-driven drives in terms of quieter operation, it's possible that your motors may undergo some changes to how they sound throughout their lifespan. All mechanical components will have an audible sound, generally overtime as the individual mechanical components wear in an become well seated and mated together the sound may change, soften and perhaps go away completely. If it ends up sounding link a crunching noise it will need to be investigated further and a warranty claim can be made to resolve this.
What noises might I hear?
Buzzing/whirring : This type of noise may be caused by a bearing making a vibratory sound.
Tinkling/Rustling: These are most often caused by dust or dirt, and can be resolved with a decent cleaning.
Screeching/howling: (Particularly changes with speed), may indicate that bearings require lubrication or grease.
Crunching: This may also be something that can be felt when the motor/wheel is moved by hand. This could be caused by a deformed bearing or severe dust contamination.
Should I be concerned?
As they are are comprised of mechanical components, hub motors can occasionally produce an audible sound, but in most cases, this is not something that you should be overly worried about. Noises can be caused by many different things, most of which will not alter the actual performance of the motor.
As the hub motors are 'worn in' with regular usage, the sound of your motors may also change, with noises often softening, or becoming so low as to not be discernible from road noise.
Noises could also be a result of general wear-and tear, particularly to the bearings of your board.
What should I do?
Maintain your board often. We recommend keeping it as clean and dry as possible between rides, paying particular attention to drying your board off if you've gotten it wet in any way. (No skateboard likes rusty parts!)
If you notice any excessive noise, or noise that is worsening with use (in particular crunching sounds), please follow this link to learn how to best maintain your Raptor 2.
If you're still getting these noises after following our maintenance guides, please contact our live support team to open up a case to get your issue resolved.