Anybody know what wheels these are?

[Kingnothing]

I can't really see the center cap, any ideas?

 

[UnloosedChewtoy]

Fuel makes some that have structures similar to the one in the picture, but they all have a bit of machining to them and/or don't have the beadlock.

You can have center caps for those style wheels customized, so the center cap may or may not help.