Kevin,
I have not run different caster tires on a ZTR, but I have on walk behinds and I have seen no difference in quality of cut, or manuerverability, or any other aspect. If you can save money do it. Alot of local tire shops have in stock or can order the tires for a mower. Keep that in mind. You may save some money through them. By the way, I like the name.
Kevin
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