Clark W. Griswold
Join Date: Mar 2014
Location: ,location, location
Posts: 14,039
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
As people have said some chains are directional but also if you put a new chain on a worn cassette it can also cause noise and shifting issues. Depending on wear it could be time for a new chainring as well. What I recommend is making sure the chain is on correctly but also you might replace that cassette and I would also remove your derailleurs and clean them well as well as chainring (if not need replacement) and just get your drivetrain nice and clean so you aren't wearing things out prematurely and you have better shifting.