Tire Loads Inflations Part 2 Marble

By roger marble i got this question from a reader of an rv forum.

Tire loads inflations part 2 marble.

This is the book where all the load inflation tables come from and might be considered the tire engineer s bible and is used by tire engineers around the world when they are making tires that are intended to be used in the us. Two forms of this are hysteresis losses see. Here we find the details of valve stem designs as specified by tra. That is not all the energy needed for deformation or movement of the wheel roadbed etc is recovered when the pressure is removed.

Since a tire s load carrying capacity is related to the tire s size and how much inflation pressure is actually used maximum loads are rated with the tire inflated to an industry assigned inflation pressure. Roger marble spent 40 years in the tire industry working for a major. Thank you for all of your informed comments regarding proper tire care. A tire s maximum load table 2 is the most weight the tire is designed to carry.

We at fifth wheel street no longer recommend adjusting trailer tire inflation pressure below the pressure associated with maximum load psi rating molded on the sidewall and only if the wheel rim is appropriately rated for tires that have a maximum of 85 psi or less regardless of the measured scaled weight of individual tire or axle. Selecting the correct tire pressure on multi axle trailers. Rolling resistance sometimes called rolling friction or rolling drag is the force resisting the motion when a body such as a ball tire or wheel rolls on a surface it is mainly caused by non elastic effects. I have always considered the cold psi on the side of my 22 5 rv tires to be the minimum to carry the maximum rated load.