Crank/bb sound

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12/10/2014 7:26 PM

Sometimes when i do a big drop or a high bunnyhop and land funky, there's a metal hitting metal noise from my bb/cranks area. Does anyone know why? Its happened on two bikes alrady

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12/10/2014 7:32 PM

Loose chain?

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12/10/2014 7:39 PM

Probably loose chain

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12/10/2014 8:04 PM

definitly not loose chain

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12/10/2014 8:06 PM

It's either you snapped a part on your bike and it's grinding, or you have a loose chain hitting on your dropout
Probably a loose chain

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12/10/2014 8:11 PM

Are you positive it's coming from your crank area?

I remember several years ago I had my headset installed with the wrong kind of lower bearing race and whenever I hopped and landed weird, it would make a loud tink noise. So we need to find a way to determine it's actually coming from the crank area.


Are they 8 spline by any chance? If so, take the arms off, grease the splines, then put them back on. Then see if it makes the noise again. I know un-greased splines can cause a noise when pedaling, maybe it's the same deal here but only when you land

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12/10/2014 8:17 PM
Edited Date/Time: 12/10/2014 8:19 PM

thanks guys but it's probably no biggy because i just had it dialed at my local shop

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12/10/2014 8:26 PM

loose chain, or loose spokes. I had loose spokes for awhile and i didn't know what it was. Then one day i got my wheels trued and that fixed the problem

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