Chain Troubles

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6/23/2013 4:46 PM

My Chain keeps falling off it is perfectly tightened. My chain wheel is close to eating through and my cranks move around the hole. Please Help

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6/23/2013 6:51 PM

Are the teeth worn down?
Is the chain line good and straight ?
Running the chain too tight with a dodgy chain line and worn teeth can make it jump off

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I'm a punk bmxer, I can't do it well so I do it loud.