Forum Discussion
mark5w
Jan 04, 2014Explorer
coolbreeze01 wrote:
My ST tires are speed rated to 106 mph. 75 is enough for me.....
Please tell us what brand and model st tires you use since this seems highly unlikely.

From the Tire Rack website:
Special Trailer (ST), as well as Light Truck (LT) tires are fully rated for trailer applications. This means ST- and LT-sized tires can carry the full weight rating branded on the sidewalls when used on a trailer.
and
Special Trailer (ST) Tire Speed Ratings
Industry standards dictate tires with the ST designation are speed rated to 65 MPH (104 km/h) under normal inflation and load conditions.
However Goodyear Marathon and Power King Towmax STR tires featuring the ST size designation may be used at speeds between 66 and 75 mph (106 and 121 km/h) by increasing their cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.
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