Case in point to an old but good thread dug up here....
"New" truck has 37-12.50 Toyo heavy load tires on 20x12s. Tires are 65psi max tires for like 3800lbs capacity.
Previous owner had all 4 around 60 psi. Idk how many miles, but tires are like new on the outside edges of tread and the middles are wore down about 4/32ths on the front and 6/32 ths on the rears. Time to rotate, but basically he just wasted 20% of the tread life by over-inflating the tires.
At $500 a pop, he pissed away $400 by not knowing how to air up a tire right!
The irony is, is the TPMS (2500 RAM) has not been re-programmed with lower limits, so he still had the tire pressure light shining the whole time anyways!
I dropped the fronts to like 42 psi and the rear to 30 psi last night. BAM, better wet traction, smoother ride and tires aren't trying to eat themselves! (Yes this is plenty of pressure for a 3/4 ton diesel with tires that size. I'd run these tires, 30F/25R in a snow storm and laugh the whole way as it drive like it has tracks!)
Bad part is, the nanny vehicle mfgs almost require overinflating of truck tires, because the general public is too stupid or disinterested to know a single d@mn thing about how their vehicle operates!
Not rocket surgery. I learned it before the internet existed. More air for more capacity, less air for less capacity. More air for better mileage, less air for better traction....novel concepts.
