chevor wrote:
Tires don't last as long at lower pressures. Keeping the sidewall as stiff as possible results in longer life and better fuel economy. Upgrade your shocks if you want a softer ride.
Think I can add to this, just a little.
Now the 19.5 inch tires may be a whole different ball game. But as far as duallys, diesels, keep those front tires aired up good. They are always carrying a lot of weight.
I've had 17 inch tires on both my last two duallys, and to my regret, I failed to properly inflate the front tires to enough air pressure on my previous vehicle, 2011 Ford F 350. Tires started to cup badly and worn badly on each edge.
I was running them at around 55 PSI, right where they were at when I bought the truck. But that was not enough. 75 PSI worked much better, much improved tire wear.
Gotta go air up the fronts on my new truck now. 18 degrees outside and no fun, but surely want no cupping or side wear on this vehicle. The TPMS on my Ram says they are down to about 61 PSI in this cold weather, and I can tell by looking they need to be re-inflated.
