reducing tire pressure when unloaded

Road Phantom wrote:
Mostly, we drive our truck unloaded, since it's our everyday beater as well. Our truck is a Ram 2500 reg cab 4X4. How low can I safely lower the air pressure to improve the ride for my arthritic wife?

If you decide to go lower than what has been recommended by the vehicle manufacturer, you MUST insure the inflation pressures you decide to use will carry the load on each tire. In the commercial world of doing things, that will require you to go to some scales and get the load on each tire position, than inflate all tires to a psi that will support the heaviest loaded position. (That is not an acceptable procedure for your vehicle and it's considered unsafe.)


There is an industry-wide inflation pressure warning that describes any tire found with an inflation pressure 20% below vehicle manufacturer recommendations to be in a "run flat" condition.