Wayne -
Unfortunately, I didn't do before-and-after measurements of the height, and now in Maine, I can't do an absolute height measurement with any accuracy. But according to the Goodyear web site, the difference in diameter of the two tires is 1.6 inches, so I would expect the larger tire to raise the trailer something on the order of 3/4 of an inch.
Just to be clear, your garage height is limited by the height of the door frame, right? Not the door itself - the height of the door can be adjusted.
Bill
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