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Old 03-30-14, 07:47 AM
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JerrySTL
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An 8-speed chain will also work perfectly for 6- and 7-speed bikes. I'm assuming that by 12-speed, your bike has six gears on the rear.

A 5-speed chain will be too wide to work properly. A 9-, 10, or 11-speed chain would be too narrow and could fall between the gears as Andrew mentions.
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