tire pressure on tow vehicle
should I increase the rear tire pressure by 10 psi, on my truck's tires or leave at the suggested 35 psi that is shown on the sticker on the door jam?
Forum Discussion
“The National Highway Traffic Safety Administration has a legislative mandate under Title 49 of the United States Code, Chapter 301, Motor Vehicle Safety, to issue Federal Motor Vehicle Safety Standards (FMVSS) and Regulations to which manufacturers of motor vehicle and equipment items must conform and certify compliance.”
The FMVSS regulations are often misquoted or quoted out of context, leading readers of internet forum discussions about tires to come to conclusions about their tires that are unsafe, unapproved and unjustified.
“What Air Pressure Should Be Used?”
“The pressure your tires require is determined by the vehicle manufacturer in conjunction with the tire manufacturer and is based on the vehicle’s gross axle load. Every vehicle is required by federal regulations to include a tire information placard. This placard may also be referred to as the tire certification label or federal tire tag. Vehicle manufacturers are required by federal motor vehicle safety standards (FMVSS) to apply tires of a suitable size, load range and inflation pressure (as shown on the tire information placard) that are capable of supporting no less than the gross axle weight rating (GAWR). Consequently, the vehicle manufacturer’s specified tire inflation pressure is not arbitrary; it is established by federal safety regulations (ref: Code of Federal Regulations 49, 571.120, and Part 567).”
The quote above is from a major tire manufacturer. Because the vehicle manufacturer’s tire inflation pressure is established as a minimum standard for the tires fitted to your vehicle, the load capacity they provide is also a minimum standard.
The FMVSS regulations are often misquoted or quoted out of context, leading readers of internet forum discussions about tires to come to conclusions about their tires that are unsafe, unapproved and unjustified.
“What Air Pressure Should Be Used?”
“The pressure your tires require is determined by the vehicle manufacturer in conjunction with the tire manufacturer and is based on the vehicle’s gross axle load. Every vehicle is required by federal regulations to include a tire information placard. This placard may also be referred to as the tire certification label or federal tire tag. Vehicle manufacturers are required by federal motor vehicle safety standards (FMVSS) to apply tires of a suitable size, load range and inflation pressure (as shown on the tire information placard) that are capable of supporting no less than the gross axle weight rating (GAWR). Consequently, the vehicle manufacturer’s specified tire inflation pressure is not arbitrary; it is established by federal safety regulations (ref: Code of Federal Regulations 49, 571.120, and Part 567).”
The quote above is from a major tire manufacturer. Because the vehicle manufacturer’s tire inflation pressure is established as a minimum standard for the tires fitted to your vehicle, the load capacity they provide is also a minimum standard.
