Wheels that fit black rock yuma

So I ordered these wheels the other day:

http://www.performance4trucks.com/W...10&t_pt=101016&t_pl=103649&t_pn=BRW908B686045

They called me and said they will not fit because they don't have a break caliper pocket. He said that the same wheel in a 17" will fit. I am not oppose to a 17" but I don't want to lose sidewalk on my tire. I am going to put the new Cooper Discoverer A/T3 on. Stock 17" wheels are 265/65/17. What is the tallest tie I can put on? My suspension is stock. I was going to put a 265/75/16 on the original wheels I ordered but now with a 17 I'm not sure.

 

265/70/17