So we are coming into snow season and I will be loading snow and moving it to an empty lot across the street....I have taken off my backhoe for the winter, my MT225s has loaded tires from dealer, so do I need to add real
ballast ?
As others have stated, you might need ballast, but try to plow without it.
Do you have hills?
What is your driveway made out of?
The reason for these questions is chains. If you have hills, and I mean, slight hills, your tractor will benefit from wearing chains. But if your driveway is paved concrete, your chains would will put little dimples all over it. Asphalt, wouldn't worry about it. Gravel, go for it. I have filled tires and chains. But my driveway is steep and made of gravel.
The amount of ballast in your tires is negligible. It's better than nothing, but those tires dont weigh much. Just looked up the tire size and the Rimguard tool, your tires filled weigh ~170lbs per tire. Thats not much. But again, better than 0.
My best advice is to run what you have. You will learn very quickly if what you have is adequate. If you feel you need more weight, put your BH on and try it. If you feel like all you do is spin, take a look at getting chains.