THE gear calculator for fixed gear bikes:

http://software.bareknucklebrigade.c...it.applet.html

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I have ridden every gear and tire combination from 56 gear inches to 82 gear inches.

They each have merit.

Most factory complete bikes come with 78 gear inches.

I consider 72 gear inches the best all around for a young, powerful rider.

I presently ride at 63 gear inches, which, because I have learned to spin, gives me a surprising amount of speed.

Sixty-three gear inches also makes it possible to ride brakeless without skidding.

Very precise, agile at low speeds, and, if tires allow, useful on dirt.