Wheel and bumper weight differences

I just did this 2 weeks ago . 15" x 7" steels with no tire weighs 24.2 lbs.. 15" x 7" Weld Draglights weighs 8.1 lbs. with no tire . That's a 64.4 lbs weight savings just in rims alone . I can't speak to bumpers , though . Later, Tom