Originally Posted by trailblazer173
What you are experiencing is a syndrome known as "chain suck". Your best bet would be to get your machine down to the lbs and ask them to put a chain checker on it. It's only a 2 second job and will tell you right away if you need a new chain or if a bit of lube can solve your problems
I wouldn't classify it as "chain suck". Chain suck occurs when the bottom run of the chain is sucked between the chain stay and chainring. This jamming action freezes the pedal action.