i have a set on a Z, not worth it IMO, for the money you can get some nice race wheels, douglas 190's with the rolled edge or pay a little more and get some beadlocks. They also weigh a freeking ton. I think 2 stock rims with the tires on weigh less than 1 rim... :lol ...not really just joking about that. im not too sure about the exact weight.
Also, the holes in them for the bolts arent big enough hardly to put the bolts in....sometimes is a pain and you have to be careful tightening each bolt so they go on straight and dont strip out.