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I have a jamis cross country 2.0 bike. the bottom bracket creaks. not sure why.

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One or both of your crank arms are probably loose. Try pulling and pushing (pretty hard) on the pedal end of the crank arm (toward the bike and away from the bike) If it's loose, it will be apparent. The arbor of the bottom bracket is usually square on the ends, and this is tapered (the square is bigger closest to the bike) You just need the right size wrench to tighten the nut that holds the crank arm onto the bottom bracket arbor.

Posted on Oct 01, 2010

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