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Why is this sound happening in my rear wheel?

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Why is this sound happening in my rear wheel?

Old 04-12-21, 10:26 PM
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Motorekib
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Why is this sound happening in my rear wheel?

youtu . be/wcDseFuvZFk
youtu . be/ljoLdVD43Ec

I also noticed the chain starts moving slightly when the wheel starts slowing down.
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Old 04-12-21, 10:36 PM
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Please post a valid URL. Preferably, one that links to the correct video.
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Old 04-12-21, 10:54 PM
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Originally Posted by oldbobcat View Post
Please post a valid URL. Preferably, one that links to the correct video.
Sorry, it won't let me. Remove the spaces between the dots, its a shortened youtube url
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Old 04-12-21, 11:13 PM
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It seems like the freewheel. It seems unusual. I can't say for sure.

I would start by running oil into the freewheel, and see what happens.

Does it function 100% while riding, apart from the noise. If it does, and oil doesn't fix it, you could pull apart the freewheel and have a look, or replace the freewheel, or just ride it as is.
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Old 04-12-21, 11:39 PM
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Is this a new freewheel? What alo said, run some light oil into the freewheel. Also remember that freewheels, freewheel cogs, and chainrings are not perfectly round, especially at lower price points. Try running a slightly looser chain just to see if that reduces noise.
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Old 04-13-21, 02:35 AM
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Originally Posted by oldbobcat View Post
Please post a valid URL. Preferably, one that links to the correct video.
I cannot get them either, youtube says it cannot find them
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Old 04-13-21, 03:15 AM
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Originally Posted by oldbobcat View Post
Is this a new freewheel? What alo said, run some light oil into the freewheel. Also remember that freewheels, freewheel cogs, and chainrings are not perfectly round, especially at lower price points. Try running a slightly looser chain just to see if that reduces noise.
Yeah, its a new bike I got for cheap.
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Old 04-13-21, 03:17 AM
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Originally Posted by Geepig View Post
I cannot get them either, youtube says it cannot find them
remove the spaces in between the dots, I can't post links because I'm new
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Old 04-13-21, 06:40 AM
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Chain is too tight
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Old 04-13-21, 08:51 AM
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Originally Posted by Motorekib View Post
Yeah, its a new bike I got for cheap.
Explains the twitching transferred to the cranks. Cheap freewheels work fine with a spring-loaded chain tensioner like a rear derailleur, which, of course, is unnecessary with a single speed. But chain tension binds against the out-of-roundness. I worked in a shop that sold tons of these. Apparently customers knew they were getting cheap bikes so they didn't notice. Loosen the chain or get a better freewheel.
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Old 04-13-21, 09:57 AM
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Time to take it apart & look for a bad bearing race.
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Old 04-13-21, 10:07 AM
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Originally Posted by alcjphil View Post
Chain is too tight
Yep, chain is wayyyyyyy too tight.
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Old 04-13-21, 09:42 PM
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Originally Posted by Motorekib View Post
youtu . be/wcDseFuvZFk
youtu . be/ljoLdVD43Ec

I also noticed the chain starts moving slightly when the wheel starts slowing down.
here it is without the chain
youtu . be/A_JOyeW7IgQ
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Old 04-13-21, 10:20 PM
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Originally Posted by Motorekib View Post
here it is without the chain
youtu . be/A_JOyeW7IgQ
Perfectly normal for a cheap freewheel. The bearings aren't the best quality but then they don't have to be- when you're coasting there's no load on the bearings.

Put the chain back on, make sure it's not too tight (a little variation is normal when pedaling) and ride the bike. It should quiet down as parts wear in.
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Old 04-14-21, 05:15 AM
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Lube the freewheel by oiling through the gap between freewheel cover and teeth ring, "run it backwards" with finger to help coating everything inside ( I would continue oiling 'til it runs from the backside gap, but you may stop when/if the sound diminishes; it will not be muted as it being a cheap frrewheel) and test. While you're at it, check the hub for grease; there is this sound like "dry" ball bearings falling onto each other and I'm not sure if it comes from the freewheel or hub.
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