You should be able to drop it a bit, and twist the “T” up through the hole so the tire comes out.
Have you checked the owners manual yet? Changing tires - to includes locations and removal/installation procedures for each part - has been covered in every…single…handbook I’ve ever seen, by every manufacturer. If you can’t find the book, lost the book, never got a book, whatever, go to your nearest dealer and ask for a free demonstration.
Chase