I got a new(ish) bike earlier in the summer. One previous owner said they had done 1200km on a trainer but the frame size wasn't good for him. When it arrived it was perfect condition just as described. I am a bit paranoid about chain wear as I have over extended before and ruined other components. I checked with my Park tool and it was barely above 0.
So it is now a few months later and I have logged 3520km on it myself and the Park tool says about 0.45, not even 0.5. I understand you should change before you hit 0.75, but this chain seems to go on and on. It must have done over 4000km. Obviously everything else was new too and it started with some low impact miles from the previous owner.
My question is, is there any other issues with wear or is chain stretch the only thing I should worry about and carry on for the time being?