First, everyone here probably should read my article, "Tires for Towable RVs & Tow Vehicles". It's published on www.thisoldcampsite.com
Second, when I had my SRW F-350 I towed with 75# in the front & 80# in the rear. None of the tires ran hot or showed unusual tread wear. When not loaded, I ran 65# all around. Once again, no unusual tread wear.
Third, RVing friends of mine with dually trucks & big 5th wheels air up their E rated tires to 80# because that's what's on the sidewall. All of their tires are showing accelerated tread wear in the center of the tread indicating "crowning" due to over-inflation. Some of these folks are full timers so they drive their trucks solo quite a bit without adjusting tire pressures.
What I do with my '13 model dually is pretty much what what the tire placard in the door jamb says: 75# front & 65# rears & I never adjust tire pressures for towing or solo; it stays the same all the time. The truck is used mostly for towing our big 5th wheel with some solo miles thrown in & my tires do not look overloaded when hitched up, they don't run hot when towing & they are not showing any unusual tread wear.
I hope this helps. Please let me know what you think of the article.
2013 F-350 Lariat 6.7 L PSD Crew Cab Dually, FX4, white platinum metalic tri-coat with black interior, N-Fab step bars, factory spray-in bedliner and 5th wheel hitch, trailer tow package, integrated brake controller, upfitter switches, Sync with My Ford Touch, memory group, remote start, reverse sensing with rear view camera, nav, satillite radio, Weather Tech floor mats, limited slip diff, moon roof, climate controlled seats, engine block heater and tailgate step.
2014 Lifestyle (formerly Carriage) 5th wheel 38' long with 3 slides & all the goodies.
SOLD: 2005 F-350 Lariat, 6.0 PSD, Torqueshift auto trans, crew cab, SRW, short box, FX4, ESOF, limited slip dif., tow command, upfitter switches, 6 CD changer, Lariat Lux. package, camper package, engine block heater, triple A-pillar gauge set (Autometer) with pyrometer, trans temp & voltmeter, MBRP 4" cat back exhaust w/5" dual wall chrome tip, dark shadow gray/ med. flint interior.
Last edited by wpetko; 05-21-2014 at 04:02 PM.