Rauh Welt... mmmmm
I know for a fact the Natty Dread is on SSR SP1s. They're also 18s, like these WORK S1Rs. The SP1 is a 3 pc wheel though, and the design is a bit different. If I had to compare the the SSR SP1 to a WORK wheel, it'd be the older WORK S1 3 piece.
This S1R is a brand new 2 piece design for 2011.