3-Piece Crank&25 Tooth Chain Wheel

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11/10/2008 5:09 PM
Edited Date/Time: 4/14/2016 5:39 PM

I was wondering what's the advantage of upgrading my current 1 piece crank & 34 tooth chain wheel set-up to a 3 piece crank & 25 tooth chain wheel set-up. Thanks!

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11/10/2008 5:15 PM

you also need a 9 tooth driver

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