Originally Posted by baddmann
Hank: Exactly. I was running 110/95 and now I can run 105/90. The ride is noticeably different. Much better.
FR switched the Berkshire from 10,500 front airbags and 255s to 12,000 front airbags and 275s in 2014. (I have the 2013 brochure and 2014 brochure and it lists the axle ratings and tires for each.)
If you think your ride is better, it can even be much better. You are running your fronts at 105 psi, but if you have the XZE2 tires, that pressure is good for 11,960 lbs, which I am sure your not carrying that. See the attached tire chart....
I suggest that you get a good idea of your actual axle weights and adjust the tire pressures to the chart for you particular tires with measuring when the tires are cool (in the morning before sun on them).
You might be able to get your front pressure down to 95-100 and rear to 95 psi. You will get the best ride, best safety and tire mileage if you match the pressure to the weigh. The pressure will change with the season temperature,