No you can not tuck the wheels on BCs, you can go right down to the tire with 18s, the way it should be. But WHY would you want to tuck the tires? How would you turn? I am running 225s on 18s dropped to the tire, maybe 1/2 a finger space and there is barely room to turn the front wheels. Furthermore every time you adjust the height you have to get your alignment done again so this isn't something you are going to be fiddling with. Just giving you some pointers, maybe that stuff doesn't matter to you.