Slightly Off Topic
I also worry about cog wear and drivetrain wear in general. This mindset has me usually installing a new chain about every 2500 to 3000 miles. I know there is about a rivet diameter of stretch at this point. The bike just seems to shift better and everything feels smoother with that brand new chain, could be mental. Part of me wants to be able to say “screw it, it’s just a bicycle, ride it till it skips”, but that will never happen.