Go with an Alivio mid or long cage derailleur and an Altus 7 speed thumb Shifter. HUGE upgrades over the stock tourney parts the bike came with. Install a new chain too.. the stock one will rust up easily and is "worn out" from the factory. KMC makes several better choices... X8 will be appropriate.
Last edited by maddog34; 11-21-22 at 01:41 PM.