tires on 2500HD
Time to put a new set of tires on my 2007 GMC 2500HD. When I bought the used truck it came with 10 ply load range Ds on it. (LT 245 75 R16) I have to run these tires at 50 PSI or else when I am drivin...
Forum Discussion
To be shure you should calculate the needed pressure with use of spreadsheet I made.
Even P-tires can be enaug for the loads to carry, but calculating makes it shure.
Only advantage is that a 10PR/E-load tires makes the sideward swaying less with the same deflection so comfort and stiffer together.
If you want to do that with a P-tire you need that high pressure, that the deflection of it gets that less that comfort gets bad.
But a E load tire needs a higher pressure for the same load on it, then a P-tire. How much more you have to calculate.
Here the link to a map on my skydrive wich belongs to my hotmail.com adress with same username as here.
Motorhome tire-pressure calculator
In this map CLICK RIGHTand choose DOWNLOADfrom the dropdown-box to download it first to your computer. Other means go wrong, like leftclicking or "open in WEB-APP", or are to complicated like "open in EXCELL" wich asks to log in with your hotmail adress.
After download open in Excell or Open Office Calc on your computer.
What you need at minimum is maximum load of tires and pressure needed for that ( E-load 80 psi) and preferably weighed wheel/pair or axle-loads of vehicle. In lack of that the GAWR's are used if given, with a reserve that I think is needed, but you can give your own reserves.
Here a picture of a filled in calculator to show what you can do with it.
Even P-tires can be enaug for the loads to carry, but calculating makes it shure.
Only advantage is that a 10PR/E-load tires makes the sideward swaying less with the same deflection so comfort and stiffer together.
If you want to do that with a P-tire you need that high pressure, that the deflection of it gets that less that comfort gets bad.
But a E load tire needs a higher pressure for the same load on it, then a P-tire. How much more you have to calculate.
Here the link to a map on my skydrive wich belongs to my hotmail.com adress with same username as here.
Motorhome tire-pressure calculator
In this map CLICK RIGHTand choose DOWNLOADfrom the dropdown-box to download it first to your computer. Other means go wrong, like leftclicking or "open in WEB-APP", or are to complicated like "open in EXCELL" wich asks to log in with your hotmail adress.
After download open in Excell or Open Office Calc on your computer.
What you need at minimum is maximum load of tires and pressure needed for that ( E-load 80 psi) and preferably weighed wheel/pair or axle-loads of vehicle. In lack of that the GAWR's are used if given, with a reserve that I think is needed, but you can give your own reserves.
Here a picture of a filled in calculator to show what you can do with it.
