China Tire Manufacturing
In the referenced document you will find information that may help your fears about double standards for “off shore” tire manufacturers. This is about Passenger and Light Truck tires. Many of them ...
Forum Discussion
Francesca Knowles wrote:
Just to throw a further wrench in the works:
Tire Rack has taken the Goodyear Bulletin posted at its site one step further, and rolled it into an info page regarding ALL ST tires. The language seems to me quite a bit clearer than the Goodyear bulletin. I guess the one thing that would be a topic of controversy per this page is how "reliable" a source it's considered to be.
Here quoting from Tire RackTire Rack wrote:
Industry standards dictate tires with the ST designation are speed rated to 65 MPH (104 km/h) under normal inflation and load conditions.
However industry standards also stipulate, if tires with the ST designation are used at speeds between 66 and 75 mph (106 and 121 km/h), it is necessary to increase their cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.
Do not exceed the wheel’s maximum rated pressure. If the maximum pressure for the wheel prohibits the increase of air pressure, then maximum speed must be restricted to 65 mph (104 km/h).
The cold inflation pressure must not exceed 10 psi (69 kPa) beyond the inflation specified for the maximum load of the tire.
Increasing the inflation pressure by 10 psi (69 kPa) does not provide any additional load carrying capacity.
The note to not exceed the wheel's max pressure is what we have been talking about all along. The problem is that most RV's are running at the max wheel pressure. Therefore, by rule, you will still be limited to 65mph. But we still see plenty of RV's traveling way over that speed. Most dealers don't even tell new owners of the speed restriction of their tires.
Keith
