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Old 04-03-20, 11:07 AM
Bill Kapaun
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Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

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Put the chain on the largest cog & ring and see how much excess chain you have.
IF you have at least three 1/2 links, you are good. (1-1/2")
Each 2 teeth > cog will require 1/2" more chain.
You want at least 1" of "slack"
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