Anyone know anything about Nakayama rims, I've been looking at the "X7"'s I didn't know if anyone had any experience with them?

 

There heavy. my buddy had 17 x 7.5 with nitto nt555 he ran a 15.5 out of 5 runs. next week he went with stock steelies with nt555 and he ran a 15.3. he didnt add any thing to his car its just there pretty heavy rims