this may be an odd question. The specs for a 2004 land cruiser state the stock ground clearance is 9.8 inches, however, when i measured the difference between my rear diff and the ground the number was off. I just put on 275/70r18s, which are 2.2 inches taller than stock. Adding half that to the stock clearance means my ground clearance should be 10.9 inches. But the actual measurement was roughly 9.75. This tells me that either the stock clearance isnt 9.8 inches, or that meausrement comes from somewhere other than the rear diff. Can anyone shine any light on this?