I know a little late for this but may help some. If you are smw what handy will try to tell you how to make home made wheel weights. Take you wheel off or use one already off.Cut a circle the size of the inner wheel at the bottom (where the mounting are. Use 1/4 to 3/8th plywood. Support the wheel on anything to raise it off the ground about 3 inches. Drill holes through the holes other than the mounting ones. Cut 4 pieces of 3/8th threaded rod. Place the lug nuts in the holes then place the plywood over them. Then place a heavy plastic bag or sheet plastic over everything draping over the wheel. place the rod in the holes and a nut and washer on both sides of the wheel hub. Drilling through the plastic and plywood and tighten evenly around the wheel. Been the rod towards the center of the wheel about 15 degrees to secure it in the cement.
Then cut a piece of sheet metal like duct work, how ever thick you want to weight to stick out past the wheel. Place it around the inside of the rim. Overlap the ends and tape securely. Smooth out the bag and allow to drape of the metal. Fill with concrete. Place a indent or mark in the concrete. aligned this the air stem in the back of the wheel. Allow to dry turn over remove the nuts and remount the wheel and then mount the cement back in place. Has worked on 4 tractors so far. You can imbed a bent rod to life the weights with to mount. Hope it works for you