Recently upgraded tractors from a New Holland TN-65 to a JD 5085. The New Holland had fluid filled tires and I guess I never really gave it much thought until yesterday while doing some elevated work with loader forks on the JD I realized how "tippy" it was.

How much would fluid fill in the tires improve this situation?
Is there a corrosion issue with the rims, valve stems, etc. on fluid filled tires?
Any pros or cons?