Eric Greenwell wrote:
jcarlyle wrote:

Whatever you choose, make SURE that it is an ST tire - this stands
for Special Trailer. And DO NOT run them at low pressure - run them
at whatever the pressure is that is stamped on the sidewall to get
maximum load carrying ability with minimum heat build up.

Be aware ST tires have a 60 mph speed rating at the standard
pressures. You can raise the rating to 70 mph if you inflate to
required pressure for this higher speed.

I didn't remember this correctly: According to a Goodyear general
information sheet:

Based on industry standards, if tires with the ST designation are
used at speeds between 66 and 75 mph, it is necessary to increase the
cold inflation pressures by 10 psi above the recommended pressure for
the load.
o Do not exceed the maximum pressure for the wheel.
o If the maximum pressure for the wheel prohibits the increase of air
pressure, then the maximum speed must be restricted to 65 mph.
o The cold inflation pressure must not exceed 10 psi beyond the inflation
specified for the maximum load of the tire.

--
Eric Greenwell - Washington State, USA
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