Tires: Proper Tire Inflation, proper tire inflation, proper inflation

Question
I am curious to know based on the tire load tables what the proper inflation should be for an upgraded set of tires.

I can tell you that the placard states GR70-15 and a cold pressure of 20 psi.

The new upgraded size is (2) P25560R-15 and (2) P27560R-15

Thanks!

Answer
Jeff,

A lot of things have happened since the days of Alphanumeric tire sizing.

And one of them is that tires need to have a minimum amount of inflation pressure to make sure they saty on the rim during cornering.  While folks may argue about what the value is, I prefer a little more pressure - 26 psi minimum.

Plus, it's been learned that there are fewer failures if vehicles use more tire load capacity.  So I would recommend you take advantage of our experience and use 26 psi.