Crank ring size help needed

Discuss light weight issues concerning road bikes & parts.
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Notstrong
Posts: 6
Joined: Fri Mar 22, 2013 10:24 am

by Notstrong

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 ??

koulis1984
Posts: 6
Joined: Mon Sep 07, 2009 3:52 pm
Location: London

by koulis1984

Yes it does

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Notstrong
Posts: 6
Joined: Fri Mar 22, 2013 10:24 am

by Notstrong

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

Thanks

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

by Juanmoretime

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.
RESIDENT GRUMPY OLD MAN.

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