As some would know I have a constant battle finding wheels that I believe are up to standard on the mowers I build. One of my problems broken wheel inserts so today I tried this novel idea. I 3/4 filled the wheel with styrene bean bag balls and then topped it off with a strong mix of concrete, I didn't want to fill them with concrete because it may have made them too heavy. Anyway a coat of black paint and they should look like new again and hopefully they won't get broken again like the plastic ones when stones hit them