Wanted for a Case 245 Tractor.

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I need two back wheels for a Case 245. I have been running W11-20 wheels with 355/80D20 tires. 6 lug with a 4 5/8" pilot hole in the center. My other options would be W12-16 or W7-24 wheels. Case does not offer them anymore. Please let me know if anybody knows where I can find some.