If you are asking about which tractors are compatible with the 72" deck, here's what I've learned. The 72" commercial deck (JD model #1996) will interchange with the F935 and the F925, which I have. It may also fit other models, too. Go to John Deere on-line parts catalog at John Deere - Parts Catalog. Plug in the mower model number. Click on Implements and see if the 1996 shows up. If it does, it fits that mower. Hope that helps you.
If you are asking about which tractors are compatible with the 72" deck, here's what I've learned. The 72" commercial deck (JD model #1996) will interchange with the F935 and the F925, which I have. It may also fit other models, too. Go to John Deere on-line parts catalog at John Deere - Parts Catalog. Plug in the mower model number. Click on Implements and see if the 1996 shows up. If it does, it fits that mower. Hope that helps you.