Post by
K03sport »
https://forums.nicoclub.com/k03sport-u129071.html
Wed Feb 10, 2010 7:44 am
The default answer should be what the owner's manual and/or the door sticker (on the driver's side) says. I would not use the tire's ratings as a starting point.
However, vehicle Mfgs usually choose a tire pressure that is meant to deliver the best ride, so they tend to lean to the soft(er) side. This may be fine for lots of people, but the only thing, I think, its good for is a soft ride. The Mfg's tire pressure may not be the best for tire wear and or best performance.
I run my tires at 10% (3psi) above what the sticker says, so 33/34psi. If I know I am going to be carrying a heavy load or a load of people, I will up the pressures to the 38-40psi range, but I will always try and stay under the tire's max "cold" pressure. Also, once you have "dumped" your load (I just said "dump your load"), you've got to air down back to your normal pressures or risk wearing down the centers and the truck will become twitchy over bumps. Of course, hot tires never tell the truth, so this can be tough.
Load and load rating on the tires also may dictate what pressures you run. XL load rated tires may need higher pressures to help support the stiffer sidewall to support the heavier load. Those who off-road, and have the tires to do so, may run them around 25psi (or lower) to reduce ground pressure. Great for the soft stuff, not so great once back on the paved surfaces.
Time of year has a lot to do with it too. Winter: tires will usually read low when cold. Summer: tires will read high when "cold".
In the end, it is ultimately a balance of comfort, tire wear, load, and tires specs in no particular order.
mmm, this is good...anyone got a papertowel...