Crank ring size help needed

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Crank ring size help needed

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Notstrong

Post subject: Crank ring size help needed

Posted: Fri Mar 22, 2013 11:24 pm

Joined: Fri Mar 22, 2013 10:24 am
Posts: 3

How can I tell what size my crankset rings are the outer one says 53-A and the inner ring says 42-A does that mean they are a 53/42 ??

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koulis1984

Post subject: Re: Crank ring size help needed

Posted: Sat Mar 23, 2013 12:04 am

Joined: Mon Sep 07, 2009 3:52 pm
Posts: 2

Yes it does

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Notstrong

Post subject: Re: Crank ring size help needed

Posted: Sat Mar 23, 2013 12:45 am

Joined: Fri Mar 22, 2013 10:24 am
Posts: 3

I have counted the teeth and they match the numbers so I assume they are

Thanks

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Juanmoretime

Post subject: Re: Crank ring size help needed

Posted: Sat Mar 23, 2013 12:11 pm

Administrator

Joined: Sat Jun 19, 2004 11:08 am
Posts: 6141
Location: Urbana, Illinois

To add a little more they are designed to work together to shift best. A 53B and 39B are designed to work together. From what I understand the tooth profiles and shift ramps are different depending up with combination you have.

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