My Factory 2004 Z06 setup =
Front
...19.2 lbs (02-04 Z06 Front 17x9.5)
...29 lbs(265/40-17)(Goodyear Eagle SC)
...48.2 lbs Total
Rear
...21 lbs (02-04 Z06 Rear 18x10.5)
...28 lbs (295/35-18)(Goodyear Eagle SC)
...49.0 lbs Total

CWW - SP500 19/19 setup=
Front
...22.5 lbs (19x10 Front SP500)
...26 lbs (275/30-19)(Continental ContiSport 3)
...48.5 lbs Total
Rear
...23.5 lbs (19x11 Rear SP500)
...28 lbs (305/30-19) (Continental ContiSport 3)
...51.5 lbs Total

http://mysite.verizon.net/res0aae8/webpage.html