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PostPosted: Fri Mar 22, 2013 11:24 pm 
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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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PostPosted: Sat Mar 23, 2013 12:04 am 
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Yes it does

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Posted: Sat Mar 23, 2013 12:04 am 


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PostPosted: Sat Mar 23, 2013 12:45 am 
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I have counted the teeth and they match the numbers so I assume they are

Thanks


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PostPosted: Sat Mar 23, 2013 12:11 pm 
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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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