The tire pressure information on my 2500HD states 50 psi in the front tires and 80 psi in rear tires. I understand the 80 when I am towing my FW, but it seems excessive when I am not hauling the trailer or any other load. It seems to me that running 80 psi in the rear tires unloaded will cause the tires to wear more in the center. Anyone have any experience in what tire pressure works the best?
Hallsboy, My truck (F-250) indicates 80 psi in the rear and 60 psi on the front tires. Whether pulling or not, I try to keep them at that pressure. Far, far far to many people under inflate their tires causing premature wear on the outside of the tire.
I highly doubt you'll experience additional wear on the inside of the tire tread running 80 psi without pulling if thats what your tires are rating for. My tires are wearing fine. Only have a bit over 10K on them.
Halsboy, I can't believe that you asked this question and I just sent off a lengthy e-mail to an engineer-friend of mine asking him the same question.
We all have the same dilema with light truck tire pressures. Your tire and your truck manufacturer, don't care how hard your truck rides empty. They care about your attorney coming after them when you do something dumb with their tires.
I once did an analysis on an SUV and the OEM tires and found out that I could run the tires at much less pressure than they recommended. There were no adverse problems and no adverse wear on the tires and they were still "flat" across the top after 58,000 miles and according to the manufacturers, the tires were severely underinflated. I monitored the pressures regularily.
I bought a "tread depth" gauge and it is as important as your tire pressure gauge and gets as much use. When towing my 5th wheel, I use 55 PSI in the front and 65 PSI in the rear. The pin weight of the 5th wheel, is 1000# in the truck bed. One sure way to gauge your tire pressure is to feel the tires (all 8 of them) while travelling. If the rear truck tires feel significantly warmer than the front truck tires or the trailer tires, add more pressure in the truck tires up to the maximum on the side wall. Do the air increase when the tires are cold. A 5# pressure increment is a good way to increase tire pressure gradually. If the sun is shining on one side more than the other, then you will feel a sgnificantly warmer temperature on the sunny side. Don't compare temperatures on one side to the other side. They will be different.
I never run the recommended tire pressure when running solo. Always lower. No problems whatsoever!!!!Remember to reinflate before towing!!!
Good luck on your decision if you decide to reduce the pressure.
1996 Ford F-250 460 CID 4x4 off-road pkg S/B
1996 26' Wilderness 5th wheel no slides
GCVW 14,000# +/- depending upon the trip.
There is a difference in lowering pressure on 8 ply tires and the lower pressure being run on the SUV tires which I never did do.
I always lowered the pressure on my 8 ply from 80 lbs when towing and recommended PSIG to 60 lbs when solo. Makes the truck ride a lot better and the tires continue to wear evenly and no safety factor involved. On my MH now with Michelin tires 22.5, pressure can be lowered if the load is lighter but maximum speed has to be decreased.
My truck came with a load/tire pressure chart from goodyear. After getting the truck weighed, both loaded and unloaded I use the pressures from the chart. 45PSI front all the time, 40 rear unloaded and 50 loaded (it's a duelly). I didn't get a load chart with my 5er so e-mailed goodyear and they sent me one. Anyone who drives at max PSI unloaded is a glutton for punishment and has an unlimited tire replacement budget IMO.
I have load range D tires on the truck (65psi max) and loan range G tires on the 5er (110psi max). I run 100 psi on the left side and 90 on the right side because the bed room and kitchen slides are both on the left side and it weighs more.