Originally Posted by Iride01

It will be okay if you wait till a new chain on your bike shows them as worn out by skipping when you put some muscle into pedaling. While some might argue that a worn ring or rear cog will wear your chain faster and you should always replace them together, that's going a little overboard in preventative maintenance for those of us that don't put in very serious mileage each year. IMO.

With some cranks, you might be better off changing the entire crankset instead of just looking for a ring for it. Might also be a time to consider if your gearing needs improvement that smaller or larger rings might help.