If these are the weights you have this is how I mount them. I usually use 4 bolts instead of 6 this way the disc stays in place. cut some scrap steel to go over the hole and then a big washer and lock nut. I set the tire on a couple of 6x6"s and when done slip a floor jack under and jack it all the way up and lift so I"m not killing my back. They can also be mounted with the tire on the tractor. The weights in the photo are 100 lbs each segment. they are about 3" thick. They also have lighter sets that are thinner. they are about 60 lbs each segment. you can also double up on these sets. I have some weights available should you need the other side or another set. Shipping is always a problem because of the weight and can kill a deal. Best if you can find them local.