Here’s my car with 285/35R18 on a 18x9.5+12
Required a little work to the front fenders.
@72bluNblu is one of the tire size gurus here. He’ll probably chime in.
View attachment 1715992921
Here’s my thread about it that has some info on how I did it and some other sizing stuff from other users.
18x9.5 +12