I know a few of us where wondering how much the TSP6 weigh, so...
http://www.tirerack.com/wheels/Wheel...autoModClar=SI
According to Tirerack, 18X8 45MM OFFSET come in at 20.15 pounds.
18X8.5 50MM OFFSET, 20.85 pounds.
http://www.tirerack.com/wheels/Wheel...All&sort=Price
That's pretty good actually.