Old 02-27-12, 04:31 AM
World's slowest cyclist.
Join Date: Oct 2007
Location: Londonderry, NH
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Bikes: Cannondale CAAD5 and Cannondale Rush

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Loud pop from drive train when under torque, what is it and how do I fix it

Good morning,

Every now and then when putting a lot of torque on the pedals I get a loud pop sound, a brief moment of zero resistance, and then the bike goes back to normal. This happens on both my bikes (a Shimano 9sp drivetrain Cannondale CAAD5 road bike and a SRAM 9sp drivetrain Cannondale Rush full suspension). I see/hear other bikes do it as well, some more than others. It seems to be a very common affliction.

What is this (there must be a name for it), what causes it and how do I minimize/eliminate it?
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