Hello all, new to the forum as I just bought my first truck

...a T4R Limited. I know that the Bridgestone Duelers that come stock on it are not great winter tires...past experience. I am looking to put on some Goodyear Duratrac's and want to go to a bigger size. I live in Wisconsin and the snow is just around the corner...so it's time to get this change made. My question is how big can I go without making any serious modifications. These may get made in the future but I would like to keep things stock for now. The 275/55 20's look to be a safe choice. Also wondering about 20 inch vs 18 inch wheels and what the advantages are to both. Have not committed to the Goodyears yet so any endorsements of other tires are welcome...mostly hwy with a little bit of off road and lots of snow. Thank you everyone, great forum and glad I found it!:bravo: