275/55/20's Fit fine on my WK2, got Bridgestone Revo's. The original thread is in the Tire and Suspension thread.
2011 Jeep Grand Cherokee Overland 5.7 HEMI
(Bright Silver Metallic)
Quadra-Lift, SelecTrac, 20' Rims, Dual Exhaust Chrome Tips, 730N UConnect Radio,
Auto Leveling HIDs, Panoramic Sunroof,
"X3F" Full Skid Plate Package, Front Tow Hooks, Trailer Hitch IV, Trail Rated x2, Volant CAI
Bridgestone Dueler A/T Revo's (275/55/20)