At what psi can I travel 65-75mph?

JJBIRISH wrote:
Industry standards dictate that tires with the ST designation are speed
rated at 65 MPH (104 km/h) under normal inflation and load conditions.

What are the industry standards and who decides what they are or should be… it is my guess between TIA and the RMA both trade organizations representing tire mfg. trough Gov. lobbying efforts…

But don’t kid yourself though their concern is to protect the tire industry not your safety… safety is the leverage word used for arm twisting policy making… their primary job is to protect the industries through lobbied regulation that shields them and shifts their burdens from their hands, often using the NHTSA for their platform…


“TIA's TirePAC was created shortly after the tire recalls of 2000 to assist those in Congress who assist the tire industry. TirePAC helps to ensure the election and re-election of officials who are friendly to the tire industry, as well as establish and maintain solid relationships with elected officials who support the interests of the tire industry. TirePAC allows each member of TIA to be heard more effectively on Capitol Hill.”

“The Rubber Manufacturers Association (RMA) is the national trade association for tire manufacturers that make tires in the U.S.
Technical and Standards formulates tire industry positions on domestic and international standards, coordinates industry positions relative to governmental rulemakings and specifications, and develops, publishes and disseminates tire safety, care, and service information.
Through the Tire Engineering Policy Comittee; RMA: Develops and recommends policy positions on engineering matters Implements engineering matters Reviews and approves industry response to rulemaking dockets Through the Tire Publications and Information Committee; RMA: Develops and drafts publications concerning tire safety, service, maintenance and care for all types of tires. Responds to inquiries, and establishes industry positions on procedures for proper tire service. “


Based on these industry standards, if tires with the ST designation are used at speeds between 66 and 75 mph (106 km/h and 121 km/h), it is necessary to increase the cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.

I would take this to mean that the cold PSI is obtained from the inflation/load chart for the tire and using that pressure plus 10 PSI would prevent tire overheating to more than it would under normal load and pressure…


Do not exceed the maximum pressure for the wheel.


The wheel is the tire and rim combination, the maximum pressure for the wheel would be the lower of the PSI rating of the tire or the rim… the lower, normally being the tire for OE (by law)..., meaning the added 10 PSI must still be at or below the Max sidewall PSI, or the speed is still restricted to 65 MPH…

The why it written might be confusing but IMHO airing the tire to 10+ the maximum PSI is a sure way to cause your tire failures…

GOOD LUCK WITH THAT…

OH YA GOOD GOING GOOD YEAR… ANOTHER NON ANSWER FROM YOU CS DEPT…

Somewhere in there ^^^ you either agree or disagree that the PSB says to inflate my 50psi tire to 60psi for use between 66 and 75mph with up to a 1360lb load.

Make it simple, the PSB says the above, or not.

Please reply with 1 or 2:

1. Yes, the PSB says 60psi.

2. No, it does not say 60psi.

If 2, what does it say?

HTH;
John