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Will jockey wheels from a 10spd M773 rear derailleur, work in my 9spd M750 one?
Posted : 26/09/2019 1:53 pm
almost certainly yes but the 'centron' sideways movement feature of the upper guide wheel has been more or less removed in 10 and 11 speed. It was a feature of 9 speed shifting that allowed the chain to centre itself on the sprocket after a shift but if your gears are well adjusted it may still be fine.
Posted : 26/09/2019 2:14 pm