I'm running 35" tires on 18x9 rims with 5 in BS. I only rub at full turn to the right on the sway bar. You don't need extra back spacing. Here's a pic of what mine looks like. I was running stock 3.73s with the auto trans and could do 60 mph pretty easily. Hills were another story. Its much better with the 4.88s I am running now. I can even use my cruise control again.
2014 JKU Rubi X, Billet Silver, auto trans, leather, tow package, color matched top and fenders, 430N Nav, remote start. XRC8 Winch, Max 3 Winch Plate and Bull Bar
Previous: 2011 JKU, Nav, U-connect, Auto, Dual Tops, Yukon 4.88s, 3.25" Rusty's Advance Lift, 35" Nitto Trail Grapplers, 18x9 Pro Comp 7031 w/ 5" BS, Rugged Ridge XDH front bumper, Smitty Built XRC8 Comp Winch...