With the Bilstein 5100's, what size tire would I be able to put on my truck. I have a 2012 FX4 Ecoboost with 20's. Im looking at Nitto Trail Grapplers and 20" XD Series Revolver rims. I do not want fender flares so the tires would not be able to stick out from the fenders to much if at all. I have been hearing you can put 285/55/20, 295/55/20 or 305/55/20. Any help would be appreciated.