Considering moving to a 38 13.50 and currently have 4.5" backspacing. I'm at 4" of lift on a 2010 JK unlimited. I've got the body, fender, and bumper issues sorted out, but I'm wondering about clearance behind the tires, specifically the sway end links and the lower control arms (and maybe the frame). The tire is also available in 37 13.50 and about 6lbs lighter, but the 37 is a load range E, whereas the 38 is still a D. The tires are heavy enough already so I prefer not to run a spacer with these two tire options...just don't want to add more stress to the knuckles and related components. Thanks for any insight.