I have never seen it listed in any Kubota literature. I don't remember anyone one coming up with the weight distribution for any Kubota tractor in several threads in the past. I guess it really isn't too important when an attachment or implement can make such a big difference in the weight loading. You just have to assume that you will have to ballast any heavy load that hangs out front or rear and always keep front loads as low as possible due to the front axle pivot.