What are the signs that a chain needs attention, and what is the correct way to maintain it?

Answer: Regular maintenance is the key here. Ideally at the end of a ride, you would lube the chain (to allow the chain lube ample time to thicken and not fly off) and check to see if the slack is within spec.

By performing regular maintenance on the drive chain, you will notice things start to change over time. Does the chain still fit the rear sprocket tight, or can you pull the chain away from it? Have you reached the end of its adjustment range? Does the chain now have tight and loose spots? All these things indicate it’s time for a new chain. Do yourself a favor when it’s time to replace your chain, spend the extra money and get a high quality one. It’s one of the few items where you get what you pay for and sitting there adjusting your chain is no fun.