Me Again wrote:
Here is the inflation table of the RAM SRW OEM tires
LT275/70R18 and LT285/60R20
PSI RATING
35 2070
40 2270
45 2470
50 2680
55 2840
60 3020
65 3195
70 3360
75 3530
80 3640
That puts the fronts about 10psi above as I mentioned.
Look at 40 PSI - 2270 x 2 = 4540
Or 1000-1500 pounds of extra capacity with a empty bed. Plenty of capacity of occasionally hauling small loads.
Leave the front at 60 and set the rears at 40 lbs cold. Report back. Front axle with weigh in at 5,000 +/-, so leave it at 60 all the time.
Chris
Looks like right on at adding 10psi to what the chart says for the fronts.