I guess need a good estimate.

If no one replies I can weigh one when I get home.

When I was selling my 4th gen wheels and tires.. I put a pair in 1 box. I had 2 boxes, 2 rims/tires in each. UPS weighed each box at 84.XX lbs. That's around 42 lbs each rim + tire... This talking about the 15's with regular size tires and without hub caps..

That sounds about right.
If you want some superlight rims in 16" that are CHEAP (to be used as spare), go with the Rota Slipstream 16x7. They weigh 13 lbs and come in Maxima offset of 40mm

The best price I was quoted was by Revolutions Motorsports at: $450 shipped
Phone: 715-834-5758
e-mail revolutions@ecol.net
www.revolutionsmotorsports.com

Good Luck.