What size tires for my 2012 Ram 1500 with Forgestar D5 rims?

[rebersole23]

I purchase the Forgestar D5 rims for my truck. I have a 2/4 drop kit on the truck and it currently has the 275/60r20's on it now. I liked the way the new rims look, but I can't seem to find comparable street tire sizes for the rims.
Any help would be appreciated. Thanks