Check these wheels out. I read about them about a year back so don't know the source but just saved the pic. As far as I can remember, these wheels are 26'' and can only be fitted to limited amount of cars (so if you're thinking of fitting it to an Alto then sorry, it only takes cars like Escalade and Hummer :P)
They cost £250,000 each (around about the same price as Phatom). So a set of 4 will cost £1 millon and the company gives a bouncer (to guard the wheels) free for a year. They made of real chrome and the nuts have diamonds on them. One nut is about £5,000 I think. All this info is I think genuine, I read about this long time ago so don't really remember clearly but they are Worlds Most Expensive wheels for sure.
Enjoy the pic:

