Montana Owners Club - Keystone Montana 5th Wheel Forum - View Single Post

skypilot · 06-02-2009, 10:43 AM

I wonder -- and this is JUST an I Wonder -- if they are advising that 10 psi extra if you are running at less than max sidewall psi. I know that on my truck, the door jamb states 65 PSI yet the tires have 80PSI stamped on them. So, given what I'm thinking, if I were to run at high speeds all day, then I could boost the pressure up to 75 PSI, still being below the 80 of the sidewall.

Obviously, this assumes that the user is running a tire at less than max pressure to begin with (also carrying less than max weight on that tire). This last assumption is what kills this for us as trailer owners -- as I've read in many posts, most of our rigs are running close to max weight so the tires have to be at 80 (or 110 for G rated tires) to carry the trailers.

Hope this all made sense.

06-02-2009, 10:43 AM	#5
skypilot Montana Master Join Date: Jul 2004 Location: Manhattan Posts: 1,144 M.O.C. #1846	I wonder -- and this is JUST an I Wonder -- if they are advising that 10 psi extra if you are running at less than max sidewall psi. I know that on my truck, the door jamb states 65 PSI yet the tires have 80PSI stamped on them. So, given what I'm thinking, if I were to run at high speeds all day, then I could boost the pressure up to 75 PSI, still being below the 80 of the sidewall. Obviously, this assumes that the user is running a tire at less than max pressure to begin with (also carrying less than max weight on that tire). This last assumption is what kills this for us as trailer owners -- as I've read in many posts, most of our rigs are running close to max weight so the tires have to be at 80 (or 110 for G rated tires) to carry the trailers. Hope this all made sense.