Great Lakes Bass Fishing Forum

The Goodyear Tire & Rubber Company
Product Service D805
Akron, Ohio 44316-0001
March 27, 2006
SUBJECT: Marathon Special Trailer Applications - General Information
Goodyear Marathon tires are widely used in a variety of towable trailer applications and are designed and branded
as "ST" (Special Trailer) tires.
This information is designed to help you obtain the best performance from tires with the ST (Special Trailer)
designation. Please review the following important points with your Goodyear Marathon customers.
· Industry standards dictate that tires with the ST designation are speed restricted to 65 MPH under normal
inflation and load conditions unless a different speed restriction is indicated on the sidewall of the tire.
· 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.
· Drivers should always obey posted speed limits and reduce speeds when necessary based on vehicle, road,
weather or traffic conditions.
· Trailers tires should be operated at inflation pressures that are specified by the trailer manufacturer. The trailer
manufacturer's inflation information can usually be found in the owner's manual, tire information placard or
vehicle certification label, usually located on the forward left side of the trailer.
· Cold inflation pressures should be checked every morning during trips and monthly while in storage.
· Vehicles or trailers should not be overloaded. The tire information placard, vehicle certification labels or
owner's manual should be checked for the maximum recommended load.
Vehicle speed, load and inflation pressures, all of which are within control of the driver, are critical factors for the
safe and enjoyable operation of any vehicle.
Important tire care information and the load / inflation tables are available on Goodyear's Recreational Vehicle web
site at www.goodyear.com/rv.