Harv,
I have a friend that does metal fabrication. He cut them with a cutting torch or a plasm torch. It's been to long for my memory. They are cut to the size and shape of the weights.
JerryG
I fit six 25 lb plates on each wheel plus the half in thick mounting plate without the weights or the nut sticking out further than the tire (R4 B2400). Total 330 lbs both sides. I am in the woods a lot so it was important not to have the weights stick out.
I removed the brackets for a while in the fall and there was not even a hint of distress around the mounting holes and they have been on the longest of any of the rim mounted weight lifting weights. My manual does not list limits for rim weights. My guess for the weight limits listed for the larger tractors is that the larger rims have the size capacity to hold a substantial amount of weight. So do the larger tires if they are filled. If you were to put a large amount of wheel weights on at the same time as filled tires, it may cause an overload. With unloaded tires I wouldn't expect a problem.
If you are carefull to center the rod and mount it at right angles to the mounting plate, the weights don't wobble at all.
John,
The end of the bolt is about 1" past the rim and that's using a 9" bolt. I have 4-50 pound weights on each side and the wheels are off set some but not all the way out. You would have to measure for own wheel dimensions.
I cut mine to fit inside the rim. They bolt on using the four holes in the rim. I cut them from 4"plate steel. Weighing in at 83lbs per side. I also have tow 4"x8" plates for the front. I can push alot of snow or pull in my neighbors 300IH. When he brakes down pushing snow, with my B7100.