I am looking for the weight of each of these rims. I want to go with 315's and don't mind going to a 18 inch Z06 rim but I want the same or less rotational mass as my 17 inch SS rims.

Does anyone know the weight of:

1999 SS ZR1 style SS rims
2000 - 2002 10 spoke SS style rims
17 inch (front) Z06 rims
18 inch (rear) Z06 rims

Thanks guys.