While there is no arguing the merits of filled tires, if you have a wet yard / soft turf, I highly recommend you use a ballast box. While the ballast box does not keep the weight right on the tires, as is the case with loaded tires, the advantage of being able to take the weight of the tractor is key for me. So far, I have never had a time where I said "I wished I had loaded tires". My brother's new Kubota is about to have the loaded tires unloaded due to his wet yard /forums/images/graemlins/shocked.gif /forums/images/graemlins/crazy.gif /forums/images/graemlins/blush.gif