Well some can actually deliver but they're very pricey and not the lightest i would think . The other thing is most of the times they're targeted for the track not roads so they're meant to withstand different type of shocks and usage.Wonder how well they will react to a pothole or rail road track crossing. There have to be some drawbacks to wheels that light.
that's really light! my advans are like 18lbs hahaha (18x9 tho)