So I recently got my 2011 JK, and I bought it with 31.5 inch tires. I am looking to get either 33 inch or 35 inch tires, but I am not sure what size to get. As of now, I am running Mickey Thompson ATZ P3, tire size LT305/65R17 on some Mickey Thompson wheels in which I do not know the width of. If I want to go either 33 inch or 35 inch, what tire size should I get, being I go with Mickey Thompson tires again?

 

For a 33" tire you want a 33" for a 35" you want a 35" they are offered in different widths. If you want metric tires the manufacturers web sites will list the sizes. You might want to find out what gears you have and do a little research on proper gears for tire size on your jeep before you buy the tires.

 

315x75x17? are like 34.5- so that might fit right between your two options.