I've been scouring the forums and have a few unanswered questions. I have a new '18 Prius Prime Advanced and therefore no spare tire. I believe if I purchase a 17x4T wheel Toyota P/N 42611-47630 and a T125/70D 17 tire I'll end up with a compact spare that will fit my car. Correct? I want to make doubly sure I need a 17" donut even though the car comes with 15" tires. If 17" is incorrect I'm back to square one. I would like to stow it vertically between the rear passenger seat and the front passenger seat back. Is there enough space to allow for the thickness of the compact spare? I do not expect to have rear passengers except on very rare occasions. Any insight appreciated. J
