08-13-2012, 06:05 AM
It could be that the pawls in the freehub have stuck. Sometimes they can gum up and stick "closed" so that they don't spring out and engage with the teeth. Try flushing out the freehub with some very light oil, like WD40. If that solves the problem, you can then stand the wheel/hub so that the WD40 drains out and then put in some slightly heavier, general bike lube.
Take a look at this: http://www.bikeradar.com/gear/article/workshop-how-to-overhaul-your-freehub-23757/
Take a look at this: http://www.bikeradar.com/gear/article/workshop-how-to-overhaul-your-freehub-23757/
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