Depends on how much yours has sagged
if you have skid plates and what brand they are
what size tires you have on
all of the above makes a difference, best bet is to take a tape measure and crawl under yours
04 Liberty, Kilimanjaro Edition, Rock Lizard RockRails/Roof Rack/Front-Rear bumper,32 inch Goodyear Duratracs,Moabs,4.10s/ 4.25 inch JBA Coilover lift /other goodies
How much ground clearance do you think the average stock KJ has. Mine is a 2005 so I figure the springs have sagged some so it has less than it did when new.
If your running stock sized tires it's the same from '02-'13(KJ and KK) since the lowest point is the center of the rear diff.Only tire size effects that measurement.No amount of sagging will effect ground clearance when your lowest point is the solid diff.
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
I suspect that 8.7" clearance is is for the complete body not just for a few points on the structure and that would mean there is going to be a lot more drag on the vehicle if you do get to the clearance limit.
The low points on the jeep are on certain spots and would give you a lot less drag at the limit.....Better mileage vs better towing..... Choices, choices.....
If it ain't broke don't fix it.....Enjoy it.