OK. So what is the clearance/height requirement , all up height of garage door?
You're looking for 'best' traction partly because of driviing difficulties, higher than usual seating for ease of entry and wide door space for the same reason. Does your garage pernit the chair to be lowered - is there sufficient space to the side, and is the roof of the garage high enough when the chair and lifting device operates?
If I am being too inquisitive feel free to tell me to B/off.
soth