[Armycopter]

I did a search but don’t completely understand the chain options. I would like to keep my current stock sprockets 17/46 but want to purchase a good quality chain for them. I don’t know what “520” or “428” means. Can someone recommend a good quality chain that wont break the bank for my stock sprockets? The chain that came with the bike stretches like a rubber band and I am concerned about its quality. Thanks.