I'd tell her it doesn't need to fit in the garage, that you aren't afraid of the neighbors knowing of your OD addiction, and that you're ready to "come out of the closet" (garage) with it.
On a more realistic note....
Some garages are built to minimal dimensions while others are much more generous. I once owned a home with a two-car garage with storage, One bay was just 20' deep, while the other was 28' deep. the doors were a FULL 10' wide, and 9' tall. A duece would fit in the deep bay without even having to grease it up to slide it in, and surely wouldn't bottom-out in the deep hole.
Simply put....
Print the specs, and have your bride help with the tape measure!
Good luck!
..... And remember.....
"A woman convinced against her will is of the same conviction still!"
Or in lay terms....
You may win the battle, but YOU will be sleeping in that garage for a while, instead of in the nice warm bridal suite.