I could not find a report on it so will just make one. Notisable specially with threaded tires, like 60`s GP. I was setting my opponents detail lower to see if it made a difference with FPS and noticed that my own tire detail dropped to a blurry state. I could not figure it out since I fiddled with GFX to get results for better or worse. I dont know though if adjusting opponents detail changes your own car in total, but it does change your tires. I had my theory that tires is now not part of your own car and so renders dirrenet when changing opponests car, but theory of my own really is wirthless. God I am blabbering. Issue: Changing opponent details changes your own tire details aswell.
I have the same, single player it works fine, multiplayer it seems i have always the same res as the opponents.
I tested it in SP. So if you down your opponets detail in SP it will also dump your tire detail. Have not tried MP.