Definitely not as light as weld wheels,but you are dealing with 30+ lbs rear tires and 26 or so for front ,so 50 + lbs sounds about right.295 50 15's on 15x10 weld rod lights was 45 lbs.5 or 6 lbs wont make that much difference ,especially if you run light weight brakes or some other weight saver.Not many cheap light weight 17" and especially 18" wheels to fit old cars out there.