Drag rim help smallest size ?

18x10 Bravado Tribute Wheels... 305/45/18 Mickey Thompson ET Street R Tires.. If you go to a 17 in wheel you will need to change sway bar links .. This is probably the cheapest way to go... You can spend money on the bead locks if you want so the tire doesn't spin on the wheel.. But Mickey Thompson ET Street r's are the tire you want