Regardless of whether the rims fit, the size tires contemplated as replacements must be spec'd for rolling circumference and the proper front to rear ratio maintained or you will tear up the gears in 4wd.
I wonder how practical two sets of tires are though. I certainly don't want to be swapping tires between chores...spring and fall maybe...(but not me)...
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I don't like switching implements anymore than I have to.
Swapping tires is just more attachment switching - No thanks it's not for me!
I have a FEL MMM BH Tiller and Front Blade and can use all 5 of these without doing any switching.