These French & Heck wheel weights will fit most of the old lettered John Deere tractors,
The price is $175 a pair and weigh I think about 160 lbs a piece.
I think there is 3 pair there
There is a pair of other John Deere weights that will fit like an 820 - 720, and I'm not sure but I think they will fit the new generation tractors like 4010 etc. They are the same price for the 1 pair