A 255/75/17 size tire equates to having an overall diameter of 32.05" which with a leveling kit up front SHOULD be fine. I would be surprised if you experienced any rubbing even while going off road.
'11 Laredo / Bright Silver Metallic / V6 / QT1
40% windshield tint, 20% front sides, 255/70/17 GY Wrangler AT Adventures, 5000k LED interior and reverse lights, K&N drop in filter
Audio: Pioneer AVH-X1500, Alpine MRX-M55, Rockford P3-12"