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Old 09-03-2014, 01:40 PM   #41
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http://www.tirerack.com/tires/tirete...sp?techid=219&

Look at the second paragraph under the heading "Special Tire (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.

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."



Interesting isn't it?
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Old 09-03-2014, 02:09 PM   #42
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I have power king tow max...I'm 5000 plus pounds under max load and I run at full air pressure. I'm comfy running 75 all day.
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Old 09-03-2014, 02:44 PM   #43
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I never said it was a good idea, just that according to the TireRack reference above, it's possible without exceeding the specified limitations of the tire. I'll still tow at 65 max, try to avoid the Interstate, and enjoy the ride without worrying about my tires.
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Blue Ox SwayPro (BXW 1503)

Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!
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Old 09-03-2014, 03:31 PM   #44
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I set the cruise control at 65mph... If someone wants to pass me, I'm in the right lane so have at it... I'm in no REAL hurry to get from Point A to Point B. Enjoy the scenery... Even at 65mph, you'll get there just fine, LOL!!
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