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 / 17" Wheels / Tow
3M 20% tint up front, GY Wrangler Silent Armors, 5000k LED interior and reverse lights
Audio: Pioneer AVH-X1500, Alpine MRX-M55, JL 12W3V3