Well it also depends on where the bag is going to sit. For example. My coils since the spring went all he way down to the spindle basically, were extremely close to the tire. Close enough my coil covers rubbed if I didn't pay attention to where I put the Velcro strip. My coilover spring's OD was just shy of 3.5".
The stock springs are huge in OD. Like 6-7" if I had to guess. BUT they sit above the tire and not next to it. So however this works out, I'm going to need a sleeve long enough that will allow the bag to sit above the tire. The bag's OD is 5.875". So the that raises the question of what bag will actually effectively slam the dog **** out of the car but when aired up will allow it to be driveable