I was actually thinking about adding used wheel weights. I did something similar when I fabricated a bulb for a raising keel on one of my many sailboats.I have seen a thread about a concrete wheel weight build. I will try to locate it. If you replace the aggregate in the concretion with small steel bits like nuts and washers the weight will be increased considerably. Don
I'd imagine you'd need a stellite drill.I wonder how hard it would be to drill through a brake rotor...I never tried
I think ball bearing would almost beg for the cement to let go of them. Maybe not.If one could get their hands on a lot of old ball bearings. Like marble sized or bigger that would make a nice heavy weight. Using them in concrete
Most are cast steel and easy to drill through! Depends on how hot they may have gotten!I wonder how hard it would be to drill through a brake rotor...I never tried
Steel or cast iron barbell weights are as rare as garden tractor wheel weights around here both have been made of plastic and sand or concrete for 50 or 60 years. DonWeights installed
Here's what I have done with easy to find cheap barbell weights. I took a piece of 1/2 flat bar stock cut to length to fit the inside diameter of the wheel, mark the existing holes in the rim and mark the center of the flat bar. The outer 2 holes are drilled for the largest bolt that can fit through the existing holes in the rim. The center hole is drilled 15/16 or 1" for a piece of 1" round stock, length is determined by the amount of weight plates you want to use plus a bit more to add a lynch pin hole. Weld the round to the flat and bolt it on. I run 5 10lb weights per wheel with the setup. Its easy to slide the weights off when not needed and the holder can stay on.