For the most part you can leave it alone if all suspension parts are good and your not wearing the tires uneven or something.
but another thing to consider too is if you air down you can spin the tire on the rim which will throw off your balance.
If you go to a place like discount tire that does free mount and balance then why not do it.
11 JKUR Auto, RIPP SC, Body Armor bumper, Warn XD9000I winch, Synthetic line,XRC Rear Bumper W/carrier, OBA W/1Gal Tank, 10lb CO2, Metalcloak 3.5 springs, Synergy track bar,drag link flip-Tie Rod, control arms and Ball Joints, C-gusset and sleeved, RuffStuff Diff. covers, FOX W\res shocks, Barricade Flat Fenders, 37 12.50\17 BFG KO2, 5.38 Motive gears, Uniden 520xl CB, Yaesu FT7900, Teraflex Big Rotors, Diablo Intune, Dynomax RC exhaust Redneck Ram. W3JEP San Diego Jeep Club-Gulf War Vet. USAF