My 276D came with 11.2 X 24 rear tires. I think they are OEM, but not sure. I would be surprised that your smaller tractor came with bigger tires.
I replaced my rims with Deere P/N CH10975 (9 X 24 Use with 11.2 x 24 tire.)
They will bolt up to the 4 bolt centers. They are available, I just purchased one last fall.
I have another Deere P/N M801801 (10 X 24. use with 12 x 24 tire) I know nothing about that number. Do your research