Ironically enough, this was a question I had this morning.. gonna keep my Axia Alloys panoramic rear view off my Viking. The cross bars on the Vike are 1.5", Looks like the cross bars on the P1K is 1.75+? Looks like I'll need a couple new clamps.
Crap... come to think of it, I'll need two more for my 20" Rigid light bar too...dangit.