Thanks everyone
I called around and the kubota dealer and other tire places use the calcium chloride which I really do not want to use. I am leaning towards RV anti freeze and water.
For filling, I noticed the tire stem has the larger threaded stud between the smaller thread stem and rim. I have a steel nut that goes against my rim which the tire place stated this means I do not have tubes in my tires. I have removed my tire air stem which then provides this larger, very very fine thread which is then has a nut to the rim. I bought a M12 by 1 pitch and 1.25 pitch but this does not seem to be the size. Does any one know the size of this threaded piece on my rim and where I can buy an adaptor to fill my tires myself?
Thanks
Scott