2010 4dr Rubicon, AT... RK 2.5 Max Travel lift with Nitto Terra Grappler AT LT 295/70 R17 tires (33.25") I am well pleased with off road performance, mostly Ouray, CO and Moab, UT.....tow behind my motorhome, (not a daily driver), for general driving as well as mild off road use....will not go to larger tire, never drive on hwy over 65 mph, most driving at 55 mph or less....from the "charts" it looks as if 4.88's would be the correct gearing for better hwy performance....my question....will the difference be enough to justify the costs of the change???? would 5.13's be too much for this application????would like to hear from anyone using either of these gears with 33's????thanks