I still don't have too much understanding of how the game works, but from what I've read here and there apparently it's possible to update the tyre model of outdated car mods. I've been searching for a way to update old models of tyres, but everything I find is just troubleshooting of the newer models in vanilla cars. And Content Manager doesn't help too much in this case, since it only tells me if there are similar tyres in other cars, and I still haven't found a perfect match for the car...
Updating tyre model in car mods
Updating tyre model in car mods