Tractor rim question

[HCJtractor]

I want to get a spare rim and tire for my Kubota front wheel. The rim is a 6 loop, with a R-1 tire. If I buy a rim and tire (minus the center hub), can I use it on either side? Of course the valve stem will be reversed, but that's ok.
I guess I can put the 6 nuts on the outside, and change a flat without taking off the center hub. I have always just removed the whole wheel intact like an auto tire, but suppose i can just remove the rim instead. Am I wrong?

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