Sittin on dubs

[Grendel]

http://images.deviantart.com/large/indyart/scifi/Sittin_on_DUBS.jpg

[MolvaDo]

Sorry guess I don't get it. Thought dubs were rims or wheels of 20" diameter or greater. I don't see any wheels in the pics. So could you fill me in on what you are talking about. I would appreciate it.
ThX

pic has interesting look although her left thigh needs a little slimming down.

unless that is it, her ass is so huge it is like a set of dubs! You Think!