street tires, unless you order the 20" as an accessory and then pick the tires. Also I do not think you can get the 20" wheels and the TRD package.OK, if I go to the dealership and order a 4x4 CM with TRD and I tell them I want the 20" wheels, will it come with 20" street tires or will it come with 20" BFG rugged trails?
Ditto, 20s don't belong offroad...in fact, I wouldn't want anything larger than an 18...more sidewall=better.I think the reason that the 18s are standard with the TRD package is to help minimize flats tires and damaged rims while off-road. The talled sidewalls of the 18s provide more damage control than the 20s will. If your truck only sees normal on-road use then 20s will be alright. I wouldn't go anyplace rocky with 20s. You may end up buying replacement wheels and tires.