If you look at the middle tractor, the 112L, in the pictures below, you will see the rear weights used on the lawn tractors, i.e. 108, 111, 112L, 116, etc. that were made from 1979 to 1985. I think they also fit the 130, 160, 165, 170, etc tractors that succeeded the 108-116 line. These weights, there are two of them on my 112L in the picture, weight about 42 lbs each and have the same hole pattern as the front weights you just made. I have two now that my nephew is using. If you can find those, they're probably be cheaper than the actual front weights.