| MTB rear derailleur shifting problem
Hi,
I have a mountain bike which shifts gear smoothly, but the rear derailleur
drops the chain back down to the small cog from all other cogs unless I keep
the shifter in place with my thumb, an obvious inconvenience. I can remove
it from its handlebar mount, but the mechanism itself appears to be
contained, un-dismantlable.
Josh
Ithaca, NY
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