Rear wheel making a rattling noise

[griefter77]

Does anyone have an idea what might cause the rattling on the rear wheel? If you can see on the video the drivechain and wheel are wobbling as well.

bike rattling noise

youtube.com

 

[Bikes4two]

Might it be the orange reflector in between the spokes? If you think it might be, just temporarily remove it and re-test.

 

[portals]

eBike Rear Hub - Clicking Noise

My rear hub has stated to make a kind of random clicking noise, I've not been able to identify where it's coming from yet and am a little concerned and want to understand what it is and fix it before taking bike out again. You can hear it in first few secs of this video, anyone any ideas...

www.pedelecs.co.uk

 

[Raboa]

When did you last change the wheel bearings?

 

[griefter77]

When did you last change the wheel bearings?

the bike is new and only done 70 miles

 

[Bikes4two]

It doesn't sound like a bearing issue to me, more something in sync with wheel rotation - I was hoping that the YT vid could be played at half or less speed to better identify possible noise sources, but that option doesn't seem to be available.

 

[Benjahmin]

Is there a vibration associated with it? Check the motor plug, it needs to be all the way in up to the marked line. I know, the noise sounds mechanical but it's amazing how a resistive connection on one motor phase can make a motor sound and feel like the bearings are falling apart.

 

[griefter77]

So its not the orange reflector, I removed it and the issue still persists.

I have checked that the motor plug is not easily accessible, I think that is inside the frame. Will check this once I got time.

The noise is still there when I turn the wheel manually and slowly without me turning on the motor.

 

[Bikes4two]

The noise is still there when I turn the wheel manually and slowly without me turning on the motor.

So is the noise synchronous with the wheel rotation then? Maybe you could post another vid either with the whell turning much slower than the first vid or with a video that can be slowed down on replay?

 

[guerney]

So is the noise synchronous with the wheel rotation then? Maybe you could post another vid either with the whell turning much slower than the first vid or with a video that can be slowed down on replay?

Soundtracks lower in pitch when slowed unless software compensates, I don't know of any online video sharing websites which offer that feature. But it's by no means impossible that one does. There's no technical reason why it can't be offered.

You could download the video and slow down playback using VLC? The challenge there is finding a way to download it from Youtube, as those services get regularly blocked to prevent copyright infringement - the Opera browser used to download from Youtube, unsure if it still offers that function.

To maintain pitch when played slow on your computer, you'd need Sound Forge, or an audio editor like it.

(Free) Audacity also does it:

 

[saneagle]

One thing you can check is that the disc screws aren't so long that they're touching the motor. On some bafang motors, you need special short screws to stop that from happening.

 

[Bikes4two]

Soundtracks lower in pitch when slowed unless software compensates, I don't know of any online video sharing websites which offer that feature.

I was thinking of something much simpler like the in-built YT facility to replay at slower speeds, just to get a better idea of wheel position when the sound occured.

 

[guerney]

I was thinking of something much simpler like the in-built YT facility to replay at slower speeds, just to get a better idea of wheel position when the sound occured.
View attachment 53596

Interesting, haven't seen that option on YT in my view of the OP's video "Short" (as they call that new format for phone vids in portrait mode, short in terms of time, perhaps also short in terms of playback options) as an option in Firefox on Windows 7 - out of interest, does the soundtrack maintain pitch when playback is slowed down?

 

[Bikes4two]

Interesting, haven't seen that option on YT in my view of the OP's video "Short" (as they call that new format for phone vids in portrait mode, short in terms of time, perhaps also short in terms of playback options) as an option in Firefox on Windows 7 - out of interest, does it maintain pitch when slowed?

I've just tried it and pitch does seem to be maintained - it's a very useful tool - I often play vids at 1.5x or higher to zip thru some of the more ponderous narrators (or those really boring vids where they insist on showing you their unpacking as though we've never seen a cardboard box before ).

The playback speed menu is accessible from the gear icon but is not, as you say, an option for the 'shorts'.

 

[guerney]

I've just tried it and pitch does seem to be maintained - it's a very useful tool - I often play vids at 1.5x or higher to zip thru some of the more ponderous narrators (or those really boring vids where they insist on showing you their unpacking as though we've never seen a cardboard box before ).

The playback speed menu is accessible from the gear icon but is not, as you say, an option for the 'shorts'.
View attachment 53597

Shows how much I use Youtube! If I find something useful, I download it to keep and play it back in VLC, "+" increases speed "-" slows it down, right arrow skips forward; a whole host of other functions are accessible via keyboard shortcuts. For some reason, autoplay on Youtube leads to aliens eventually, without the more interesting cardboard boxes in sight (apart from the flying saucers).

 

[griefter77]

I have received an email from the manufacturer, and they said that it might be something to do with an imbalance in the motor, is this easily fixable and can it self-adjust given time?

 

[saneagle]

I have received an email from the manufacturer, and they said that it might be something to do with an imbalance in the motor, is this easily fixable and can it self-adjust given time?

They're talking ballcox. Did you check the disc screws? How did the noise start? Did it do it from new? What changed to cause it to start?

 

[Nealh]

I would say it is rotor screws that are two long and agrre with d8veh.
There is nothing inside that can cause that noise otherwise.

With the rotor screws if too long they will catch and rub, causing such a noise as they hit the revolving motor innards.

The noise isn't a common motor or electrical fault but a wearing rubbing noise so one has to look at the obvious that will coincide with the rotation.

 

[griefter77]

They're talking ballcox. Did you check the disc screws? How did the noise start? Did it do it from new? What changed to cause it to start?

I have checked the disc bolts and it seems that they are directly integrated with the motor? Do you suggest that I loosen it or? I also made another video showing it from the other side and slower

rattling noise 2

youtube.com

 

[saneagle]

The screws are in spiggot , so it won't be them that's causing the problem. if only you guys would give us information in the first place, it would save a lot of time and effort. What about answering the other questions I asked.

Undo the two brake caliper screws and lift off the caliper. See if the noise goes away. Also check that the disc screw heads aren't touching anything.

The rack bolt looks pretty close to the disc too.