Knocking Noise from...
 

Knocking Noise from Rear Hub

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Mavic Allroad Disc with Instant Drive 360 freehub.

Makes a rhythmic knocking/clunking noise when pedalling or just spinning. 

Appears to vibrate the bike too, like you can feel it throw weight forward as the noise happens.

I don't notice it when riding but that's not to say it isn't still doing it.

Everything is greased and torqued correctly.

Any ideas? 

 
Posted : 21/07/2025 11:15 am
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I think it’s most likely to be a bearing on its way out, but if they’re ok, then possibly a bent axle?

 
Posted : 21/07/2025 11:35 am
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Posted by: temudgin

I think it’s most likely to be a bearing on its way out, but if they’re ok, then possibly a bent axle?

Could be bearings as I've done around 1500 miles on the wheels and they've had a hard life.

It's actually a new axle for attaching a bike trailer (only around 40 miles on it), but I'll refit the original to rule that out.

 
Posted : 21/07/2025 11:51 am
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It turned out to be something really stupid, excess tyre plug rubber hitting the chainstay! 

Now neatly trimmed and the bike is silent again. Well, apart from the "swarm of angry bees" freehub.

At least it was a free fix 😆

 
Posted : 22/07/2025 4:49 pm
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Glad that it wasn’t a costly repair! 

 
Posted : 22/07/2025 7:07 pm