best tire size for mini tub?

even with 17" wheels i have to jack up the car, put it on stands and unbolt the rear shackle to let the rear come down. then i can get the wheel off. i have 17x11 wheels with 7" backspace. 325-45-17 tires. they are 28 tall and 12 wide.

+1 on that. With the 4 link, I have to unbolt the coil overs and drop the rear as far down as it will go and that BARELY gets it down far enough to get the tires in. Then, partially get the tires in crooked, jack up the rear a little, re-adjust the tires, jack up rear, then I can get the tires on straight. Bolt the coil overs back on and away we go. I hope that I never have to change a rear tire on the road. It would be next to impossible to do out there.