I got 80 lb for my 2007 factory 20" with Goodyear 275/55-R20s with a little wear on them.
The 2007 OEM aluminum 17"s with 245/70-R17 General Ameritracs were 55 lb.
I've weighed 17" steel and 18" alum. Z-71s and they were in between. IIRC, the 17" steelies (SS clad) were about 70 lb with tires.