I wonder if my Pilot Sport Radial-Xs are directional or not. Ive got a bit of negative camber and wonder if i can rotate between the rear 2 as i have a staggered setup??:help

The normal wear pattern on a BMW is the outside edges of the fronts and the inside edges of the rears. A font to back swap (for a square setup) will equalize that wear and get a bit more use from the tires. Obviously that's not a possibility with a staggered setup. I don't know if those tires are directional, but if they are there should be markings on the tires indicating the direction of rotation.

The wear pattern should be even side to side. If one side is wearing faster than the other I'd suspect an alignment problem.

look at the tread to tell directional or not.
if the tread seems to point in an obvious manner in one direction, then they are.

Oh..im just blind. Found the markings and yup its directional. Looks like im getting new rubber for my shoes.

tire rack is best price.