I've put about 500 kilometers on my new Trek Domane thus far, and there are two annoyances in the drivetrain:
- When I slowly rotate the cranks backwards, I hear grinding or something "gravelly" coming from what seems to be the right side of the bottom bracket
- Something near the rear derailleur or cassette also makes a bit of a grinding noise
I've ridden in a bit of rain and even on the occasional gravel, but I don't think those noises should be normal on a new bike with 105 and Ultegra components. I keep the chain lubed and then wipe it carefully and it's not making noise, and I'm not experienced enough to be able to tell exactly where the noises are coming from — but I do notice that it doesn't spin totally smoothly, and that's a warning sign to me.
As someone with apparently no clue whatsoever are there any steps I can take to better identify the issues? I've gone to bike shops for my maintenance needs for the last decade and change but I'm eager to learn about maintenance because I've simply never done it before. On the other hand, if this if this is beyond something I could at least diagnose for my own edification (before taking it to a bike shop anyway), I'm also okay hearing that.