Chain Links

Is there a rule of thumb that you should go by when changing gearing on how many links to take out to how many teeth you change? Thanks. :thumbsup:

Each tooth added or subtracted should move the axle half of half the change in sprocket circumference. The pitch of a 520 chain is 5/8", so if you go one tooth smaller, the circumference of the sprocket decreases by 5/8". The chain runs over half the circumference, so the path of the chain is shortened by 5/16". Since there are two runs of chain, the axle must move half of that, 5/32", to make up the difference.

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