Wow! That is really sweet. They are on special order though. I wonder how long it will take.
Based off the enkei site:
http://www.enkei.com/rsm9.shtml
and their chart:
http://www.enkei.com/size_chart/rsm9.pdf
It looks like the weight is N/A... so these rims are probably new! The weight on tirerack looks like a typo though as the other sizes list around 16lbs, which is still pretty light.