>>994350You just need "a" chain, they come longer than they need to be for a reason. Unless you have a premium bike and you're looking to speed away, any chain will do. I've been riding with a 3.50 bucks no-name chink chain and a quick link on a shimano cassette for the past 2000 miles and not a single problem has appeared, shifting is fine and everything. Yes, quick links are definitely worth it, buy at least two. As for degreaser, just fricking go with dishwasher soap or chanteclair.