I know that they make spacers tha go in between the wheel and brake that push out the wheel so the dustcaps will fit. They also mess up your alignment and requre to get it aligned again.
You can also take off the dust caps but I don't know if that can cause any long term damage. I have the same problem with 17 ADR Nengans. I haven't put them on because i want to figure out what to do also.
I have a set of 18" Niche Shok's and had to take mine off. They have been off since '99. I have had no problem's, but you need to keep the bearings greased and check them often to see if you are getting any contamination.
I know you have to take off the wheels but i am also unsure of exactly what you need to unbolt to remove them. I think that i am going to go with spacers because i don't want to risk my bearings on my 2001 tacoma.
I solved my problem by taking the inside of the center caps that go on the rims and using a die grinder to cut it down. I cut it down to the sticker almost and popped them on, NO PROBLEMS YET!!!!! Just a hint on another idea!