At what psi can I travel 65-75mph?
This Maxxis pdf has the same table. Using the table(s) above, my ST175/80R13 with 1060lbs load could run at a minimum 35psi with ~4% reserve capacity. Is there a +10lbs rule? I run with +1...
Forum Discussion
PSB #2011-13 replaced, PSB #2006-06, which replaced another PSB that required a PIS increase of 10 to travel at speeds of 66 to 70, in addition to travel at speeds of71 to 75 it called for a reduction in the maximum load by 10% also… there might have been a PSB in-between to but I don’t remember nor can I find anything about it…
Anyhow GY list no such PSB’ on their website any longer that I can find and I suspect the quoted material is obsolete and not valid today…
Product Service Bulletin
Important Information To Better Serve Your Customers
This PSB is Applicable to: U.S. & Canada
May 18, 2011
PSB #2011-13
TO: Goodyear Company Owned Outlets, Goodyear Contract Dealers,
Goodyear Canada Inc. Dealers
Subject: Tires for Trailer Use Only: General Information (replaces PSB 2006-06)
This bulletin provides important information to help your customers obtain the best performance from “Special Trailer” tires. Please review the following important points with your trailer tire customers.
Special Trailer (“ST”) Tires
Goodyear Marathon trailer tires are widely used in a variety of towable trailer applications and are designed and branded as “ST” (Special Trailer) tires.
•
Industry standards dictate that tires with the ST designation are speed rated at 65 MPH (104 km/h) under normal inflation and load conditions.
•
Based on these industry standards, if tires with the ST designation are used at speeds between 66 and 75 mph (106 km/h and 121 km/h), it is necessary to increase the cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.
o
Increasing the inflation pressure by 10 psi (69 kPa) does not provide any additional load carrying capacity.
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 (104 km/h).
o
The cold inflation pressure must not exceed 10 psi (69 kPa) beyond the inflation specified for the maximum load of the tire.
General Information
Important trailer tire care information and load / inflation tables are available on Goodyear’s Recreational Vehicle web site at www.goodyear.com/rv. Encourage your trailer tire customers to use this information.
•
Drivers should always obey posted speed limits and reduce speeds when necessary based on vehicle, road, weather, or traffic conditions.
•
Many trailer manufactures establish the recommended tire inflation pressure based on the 65 mph (104 km/h) rated speed for ST tires. In these cases, the ST tires should be inflated 10 psi (69 kPa) higher than the trailer placard for speeds up to 75 mph (121 km/h) (wheel must be rated for this higher inflation pressure). If the trailer manufacturer’s placard specifically states that the cold inflation pressure is suitable for speeds above 65 mph (104 km/h), no additional inflation pressure adjustment is required.
THE GOODYEAR TIRE & RUBBER COMPANY, GOODYEAR CANADA INC
PRODUCT SERVICE DEPARTMENT
Page 2 of 2
• Light Truck (“LT”) designated tires do not have the same load carrying capacity as ST tires. If LT
tires are used on trailer applications, the inflation pressure and/or tire sizing will need to be adjusted
to match the load carrying requirements 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, and/or owner’s manual should be checked for the maximum Gross Vehicle Weight Rating
(GVWR) and the fully loaded trailer must not exceed that weight.
• 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.
Product Service Bulletin
Important Information To Better Service Your Customers
Post For Ready Reference
March 6, 2006
PSB #2006-06
TO: Goodyear Company Owned Outlets
Goodyear Contract Dealers
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 bulletin 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.
THE GOODYEAR TIRE & RUBBER COMPANY
PRODUCT SERVICE DEPARTMENT
Page 2 of 2
• 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, or by ordering the Recreational Vehicle Tire and Care Guide,
product code 700-862-911-55600.
Anyhow GY list no such PSB’ on their website any longer that I can find and I suspect the quoted material is obsolete and not valid today…
Product Service Bulletin
Important Information To Better Serve Your Customers
This PSB is Applicable to: U.S. & Canada
May 18, 2011
PSB #2011-13
TO: Goodyear Company Owned Outlets, Goodyear Contract Dealers,
Goodyear Canada Inc. Dealers
Subject: Tires for Trailer Use Only: General Information (replaces PSB 2006-06)
This bulletin provides important information to help your customers obtain the best performance from “Special Trailer” tires. Please review the following important points with your trailer tire customers.
Special Trailer (“ST”) Tires
Goodyear Marathon trailer tires are widely used in a variety of towable trailer applications and are designed and branded as “ST” (Special Trailer) tires.
•
Industry standards dictate that tires with the ST designation are speed rated at 65 MPH (104 km/h) under normal inflation and load conditions.
•
Based on these industry standards, if tires with the ST designation are used at speeds between 66 and 75 mph (106 km/h and 121 km/h), it is necessary to increase the cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.
o
Increasing the inflation pressure by 10 psi (69 kPa) does not provide any additional load carrying capacity.
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 (104 km/h).
o
The cold inflation pressure must not exceed 10 psi (69 kPa) beyond the inflation specified for the maximum load of the tire.
General Information
Important trailer tire care information and load / inflation tables are available on Goodyear’s Recreational Vehicle web site at www.goodyear.com/rv. Encourage your trailer tire customers to use this information.
•
Drivers should always obey posted speed limits and reduce speeds when necessary based on vehicle, road, weather, or traffic conditions.
•
Many trailer manufactures establish the recommended tire inflation pressure based on the 65 mph (104 km/h) rated speed for ST tires. In these cases, the ST tires should be inflated 10 psi (69 kPa) higher than the trailer placard for speeds up to 75 mph (121 km/h) (wheel must be rated for this higher inflation pressure). If the trailer manufacturer’s placard specifically states that the cold inflation pressure is suitable for speeds above 65 mph (104 km/h), no additional inflation pressure adjustment is required.
THE GOODYEAR TIRE & RUBBER COMPANY, GOODYEAR CANADA INC
PRODUCT SERVICE DEPARTMENT
Page 2 of 2
• Light Truck (“LT”) designated tires do not have the same load carrying capacity as ST tires. If LT
tires are used on trailer applications, the inflation pressure and/or tire sizing will need to be adjusted
to match the load carrying requirements 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, and/or owner’s manual should be checked for the maximum Gross Vehicle Weight Rating
(GVWR) and the fully loaded trailer must not exceed that weight.
• 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.
Product Service Bulletin
Important Information To Better Service Your Customers
Post For Ready Reference
March 6, 2006
PSB #2006-06
TO: Goodyear Company Owned Outlets
Goodyear Contract Dealers
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 bulletin 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.
THE GOODYEAR TIRE & RUBBER COMPANY
PRODUCT SERVICE DEPARTMENT
Page 2 of 2
• 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, or by ordering the Recreational Vehicle Tire and Care Guide,
product code 700-862-911-55600.
