Is the chain the most under-appreciated component on your bike? It sure takes a lot of abuse, and most of us neglect it. Yet the great chain keeps chugging along.Nick Murdick from Shimano knows all about chains — how they're made, how they've changed over the years, what makes a good chain and what makes a not-so-good chain. He joins VeloNews tech editor Dan Cavallari to give us all the info we need to choose the best chain and treat it right.