My Z has nismo rims when I bought the car the back tires were 275/40/18 and the front ones were 245/40/18 I’ve always just kept buying the same tires but recently when I got my front tires replaced I was told that my front tires are too big they wear the most on the inside closer to the steering knuckle I guess they’re rubbing somewhere and that’s making them go bad faster they guy told me next time I should get 235s or 240s and that should fix the problem I’ve only had the front tires on for about 3 months and they already need to be replaced again, my suspensions also getting pretty bad and I don’t really have the money right now to get everything fixed up but just wanted to hear some opinions on what tire size to get

 

tire sizes are perfect, the wear is because you need an alignment

 

The toe is likely off and as mentioned, you need an alignment. You should get an alignment whenever you purchase new tires.

Are you on stock suspension? What 18" "nismo rims" do you have?

 

you have a photo of them ?