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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  are my bearings fooked?
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Author Topic: are my bearings fooked?  (Read 663 times)

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Offline pickle

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are my bearings fooked?
« on: March 28, 2011, 08:30 PM »
Changed my chain and sprocket this evening and when I pedal backwards there's a horrible grinding noise, but it goes when you ride. They are old so could be knackered.....oh its the bb ones I'm on about.

Offline kuwahero

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Re: are my bearings fooked?
« Reply #1 on: March 28, 2011, 08:37 PM »
how tight is your chain as it can sometimes cause it.

Offline Munnyella

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Re: are my bearings fooked?
« Reply #2 on: March 28, 2011, 08:39 PM »
Is your rear freewheel/sprocket in good order?, crank bearings would be noisy in either direction
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Offline pickle

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Re: are my bearings fooked?
« Reply #3 on: March 28, 2011, 08:41 PM »
I loosened off the chain and it still does it, played around with spacers as I thought the chain alignment might be part of it but its made no difference. Take the chain off and they spin okay with no noise. The rear cassette is fine as I put it in another frame.

Offline Gary72

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Re: are my bearings fooked?
« Reply #4 on: March 28, 2011, 08:49 PM »
did you have to shorten the chain, If so have a look at the chain where you joined it. I've had it in the past where the chain link is tight and kink's :)
Not sure if that would make a noise or not

Offline pickle

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Re: are my bearings fooked?
« Reply #5 on: March 28, 2011, 08:57 PM »
Yeah I will have a look tomorrow, it was a brand new chain.....could be the problem.

Offline oldtired

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Re: are my bearings fooked?
« Reply #6 on: March 28, 2011, 08:59 PM »
is the chain a wider one might be rubbing on one of the stays when its not under pressure

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  are my bearings fooked?
 

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