Hey guys i'm gonna buy new tires for my 96' grand cherokee limited. And i was wondering how big are the tires when they come from the factory? And how big should i get? It's completely unmodified.

Look on the side of one of your tires for the original size

x2, or I believe the inside sticker on your driver side door should have the tire size as well. Any idea on what brand or tread type?

VIN might say but I have no idea

This^^.

I installed 30/9.5/15 on my 96 GC back in the day. Looked much better but I did get a slight rub on the LCA at full lock.