Got a bent Tourney 6-7 speed long cage with a single front gear and 14-28 rear cassette. Going to replace. Any recommendations on an upgrade? Was never really satisfied with the shift quality.
Bike is a 20" Zizzo folder Campo model. Direct bolt hanger.
Shift adjustments never really seemed to hold very long before having to mess with it.
Grip shifter equipped.

Thanks in advance.