Looking to get new tires, but don't have any idea what size I can get that will fit on my stock 2008 4x4 Crewmax. I have the TRD package with 18" wheels, but wanted larger tires that what came with truck. Does anyone know what size tires I can go to? Also, if I can get some cheap black 18" rims, what size should I go with, tires included that will fit my stock truck. I don't have a lift on it. Thanks for any help guys!