China Tire Manufacturing

Francesca Knowles wrote:

BeerCan wrote:

RVUSA wrote:

BeerCan wrote:
The mere fact that all ST tires are limited to 65mph should be the first indicator.

Nope. you can go on Goodyear's site and they list instructions for over airing the tires to allow for 75 mph on their Marathon ST's.

Maxxis used to do the same thing but they stopped. I thought GY stopped recommending that also. I looked at the product page and the load Inflation tables and could not find that language anywhere. Could you link it here?

Will this do for a starter? It's a cut-and-paste from another site of a response letter from Maxxis on this very subject. I'll post a link to the discussion thread so folks can satisfy themselves as to its authenticity....reading the earlier remarks of "Jared", the letter recipient, ought to suffice as proof of his lack of any agenda.:

Following is from post #81 at this link

Maxxis Support wrote:


Well, I have a reply from Maxxis. I'm quite surprised.


Jared,
According to the Tire and Rim Association the inflation pressures and load specifications in general for any ST Radial trailer tires, regardless of the manufacturer, are designed and rated at 65 MPH. However, if the speed is higher than 65 MPH, the pressure and load need to be adjusted according to the following guidelines:
From 66 to 75 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) but requires no load adjustment.
From 76 to 85 MPH – the tire inflation pressure needs to increase 10 PSI (not to exceed the maximum PSI the tire is rated for) and load should be reduced by 10%.

ST (Special Trailer) Radials are designed specifically for use on trailers. They have different construction features and materials that vary from Auto and/or Light Truck tires.
There are no merits in using a Light Truck tire over an ST Radial if the intended use is for a trailer. Maxxis would not recommend any tire be used in any application it was not designed for.
Thanks for your inquiry and interest in Maxxis Tires.
Best Regards,
The Maxxis Support Team

Twice I have sent that very letter to Maxxis for comment and twice I have received no answer.

Vehicle manufacturer's set all recommended (correct) tire pressures. If that procedure is not authorized in the vehicle's owner's manual the subject is moot because they have already stated to not exceed the pressure molded into the tire's sidewall.

FastEagle