Re: Laredo Tire Sizes
Your easiest upgrade without affecting your speedometer/odometer would be to go with the LaredoX/Off-Road package wheels and tires.
OEM 18" wheels:
18 X 7.5"
OEM 18" tires:
My OEM Michelins were worthless at 27k miles last fall.
I went with Goodyear Wrangler A/T Adventure with Kevlar tires in the OEM size. They are 4lbs heavier than the OEM tires and have 1" wider tread, not to mention a much better/aggressive tread pattern for snow/rain/off-road.
I lost 2mpg with the tires, but the better traction is more than worth it.
While you are at it...
Go for the 'full' size tow package spare (that fits under the rear cover)
245/65R18 - Kuhmo Solus KL21
MOPAR 18" steel wheel = 68051987AC