Old 07-14-13, 08:10 PM
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Join Date: Apr 2009
Location: New Rochelle, NY
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Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

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It's hard to critique anybody's gear selection, but there are three things to consider.

1 ride the gear that's comfortable n\for you in any situation. This is the main objective, but if when you have choices between two comparable combinations the following may help decide.

2- larger sprockets are more efficient, and produce less wear. So if you can choose between the outer and a larger rear instead of the middle and a smaller on, larger is usually better.

3- sprockets that are better aligned are more efficient, so outer with outer half of the cassette, middle with middle, etc. This isn't digital as in good and bad, just a matter of degrees.

Rules 2 and 3 are often in conflict since using the larger chainring may force you inboard on the cassette, and the middle with a smaller sprocket may be better. So throw it all into the hat and remember that rule 1 is what drives the process.
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