[duckfan]

I am thinking about replacing the main drive chain on my bike. It's pretty rusty in color, and there isn't much adjustment left. If I am replacing the chain should I replace the front and rear sprockets as well? I have looked at the sprockets before and they appear to be fine, but I am fairly new to this and I am not sure what to look for exactly. ;-)

 

[Calamarichris]

Yes. If your chain is old, then your sprockets are worn. If you don't replace the sprockets too, the new chain will not last as long. And many chains will turn red when they give-up-the-ghost, but that's not rust, it's blood. The internal grease inside the sealed rollers is red in color, so if your chain suddenly starts turning red one day it's bleeding to death and is not long for this world.
Good luck.
-CCinC