I'm running ProComp Xtreme AT 315/15 r16 (load range D) on 2011 JKU Rubicon with 3" puck lift. 80% tread remaining, and driven 90% on the highway. Ride is rougher than expected, and feel like tires may be over-inflated. I've seen tire pressure recommendations from 30 psi to 65 psi. What's the ideal inflation for these tires under these conditions? Thanks.