Lowering TV tire pressures
For those of you with diesel HD trucks that lower their tire pressures when not towing, what do you set them to? My Ram calls for 60psi front and 80 in the rear. As most know, this gives a pretty h...
Forum Discussion
Cummins12V98 wrote:wilber1 wrote:Cummins12V98 wrote:wilber1 wrote:Cummins12V98 wrote:
" If you tailor your pressures for your actual load, you are running your tires at their maximum because that is what those tables mean. They are not recommended pressures, they are the maximum load the tire can handle at that pressure."
If you contact GY Tech they will tell you it's fine to use those numbers but to also add 5psi to what the chart dictates.
They are just giving a fudge factor in case you are out on your weights. Goodyear doesn’t know what application the tire is being used for, they are just giving maximum weights for specific pressures. Do you think NASCAR uses tire load charts or do they use the optimum pressures to give the best performance for their particular vehicle? Vehicle manufactures specify pressures that give what they consider to be the best compromise between load capacity, wear, handling, braking and ride for that particular vehicle. Not all vehicles using the same tire will use the same recommended pressures for that very reason.
Yes they do add 5psi because the load can change going down the road. Follow the chart with proper inflation based on load and the tire will wear even, better ride and stopping plain and simple.
Not sure what NASCAR has to do with the subject.
Load charts are about load, not wear. You can have two different vehicles, weighing the same using the same tires that will need very different pressures to give optimum performance because they are very different in other ways and uses. The tire manufacturer doesn’t know how the tire will be used in every case, only how much weight it can support at a given pressure.
Have you ever gotten 80, 100 and 120 out of a set of tires? The formula works! I add 10psi to the fronts because of edge wear turning and 5 to the rears.
Contact patch for best braking tread wear and ride ALL are best at proper inflation using the weight/inflation charts. I learned a lot talking to GY tech on this subject years ago.
I will add to the vehicle manufacturer’s recommended pressures if I am experiencing edge wear. The tire manufacture doesn’t know what application his tires will be used for, he just doesn’t want people to overload them.
Read what it says at the top of the chart.
“Tire load limits at various cold inflation pressures used in normal highway service”
It doesn’t say anything about them being recommended pressures for your particular vehicle.
