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Technical & Reference Section => Tech and Restoration => Topic started by: pickle on March 28, 2011, 08:30 PM

Title: are my bearings fooked?
Post by: pickle 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.

Title: Re: are my bearings fooked?
Post by: kuwahero on March 28, 2011, 08:37 PM

how tight is your chain as it can sometimes cause it.

Title: Re: are my bearings fooked?
Post by: Munnyella on March 28, 2011, 08:39 PM

Is your rear freewheel/sprocket in good order?, crank bearings would be noisy in either direction

Title: Re: are my bearings fooked?
Post by: pickle 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.

Title: Re: are my bearings fooked?
Post by: Gary72 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

Title: Re: are my bearings fooked?
Post by: pickle on March 28, 2011, 08:57 PM

Yeah I will have a look tomorrow, it was a brand new chain.....could be the problem.

Title: Re: are my bearings fooked?
Post by: oldtired 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