5th wheel tires

Cummins12V98 wrote:

Curly2001 wrote:
The Endurance tires I purchased from Discount came with the advice from Discount to run them at MAX pressure all the time for the best towing/tire results. The trailer came with China bombs which did blow up, I tried Carlisle which one blew apart, and now have Endurance which so far, have done fine in the Arizona heat. Last year came through Phoenix at 112 degrees with my fingers crossed, checking my tire monitors and did make it to Tucson with no problems.
Curly

That is purely a CYA statement on their part. Example, some may be right on the edge of having enough capacity on a 65psi "D" rated tire. It would be stupid to run 80psi stepping up to "E" If the tires weight dictates 65. GY Tech will tell you to use the weight/inflation chart when up sizing load range and add 5psi to what the chart says.

Example would need 70psi. Per GY Tech running too much air will give you less stopping, rougher ride and more tire wear.

To the nay sayers that I am sure will comment WHY do every tire made have a load/inflation chart if it should not be used?

My fifth wheel is a Montana 38 foot long, its GVWR 15,500, on 7K axles. IF that fifth wheel is loaded to its max GVWR ,and I will be conservative here ,and only use 20% for the pin, giving it more weight on the axles, when quite possibly it could more then the 20%.

20% of 15,500 is 3100 lbs leaving 12,400 on the axles or 3100 per tire . I am running Sailun S637's ST 235/85/16 rated for 4400 lbs at 110 psi. Inflation chart calls for , and I would be in the middle here 60 psi for 3060 lbs ,and 65 psi for 3200 . So according to YOU, and that inflation chart, I should be inflating those G rated tires at about 70 psi.

My point ,and I am curious ,there a lot of Montana fifth wheels out there running those Sailuns, I am going by just the number of posts on the Montana forum, I'm saying the ones that did not come with them. They come now with the G rated tires. . Anyone here on this forum running those Sailuns , lets say between 70-80 psi. with a fifth wheel in the neighborhood of 15-17K GVWR , that puts them around that 70-80 psi on the inflation chart. The heaviest Montana fifth out there as far as I can tell has a 16,500 GVWR.

I don't ,and won't run my G rated Sailun tires according to their inflation chart, and its very doubtful you will find anyone running those big Montana fifth wheels anywhere near 70-80 psi, they are most likely running at the least 95 or more. You seem to be the only one that I have heard push this inflation chart .