ASL-700 OPERATOR 02-03-2022
Bruno Independent Living Aids
16
d
DOT HS 809 361
Oct
ober 2001
U.S. DOT Tire Identification Number
This begins with the letters “DOT” and indicates that the tire meets all federal standards. The next two
numbers or letters are the plant code where it was manufactured, and the last four numbers represent the
week and year the tire was built. For example, the numbers 3197 means the 31st week of 1997. The oth-
er numbers are marketing codes used at the manufacturer’s discretion. This information is used to contact
consumers if a tire defect requires a recall.
Tire Ply Composition and Materials Used
The number of plies indicates the number of layers of rubber-coated fabric in the tire. In general, the
greater the number of plies, the more weight a tire can support. Tire manufacturers also must indicate the
materials in the tire, which include steel, nylon, polyester, and others.
Maximum Load Rating
This number indicates the maximum load in kilograms and pounds that can be carried by the tire.
Maximum Permissible Inflation Pressure
This number is the greatest amount of air pressure that should ever be put in the tire under normal
driving conditions.
UTQGS Information
Treadwear Number
This number indicates the tire’s wear rate. The higher the treadwear number is, the longer it should take
for the tread to wear down. For example, a tire graded 400 should last twice as long as a tire graded 200.
Traction Letter
This letter indicates a tire’s ability to stop on wet pavement. A higher graded tire should allow you to stop
your car on wet roads in a shorter distance than a tire with a lower grade. Traction is graded from highest
to lowest as “AA”,”A”, “B”, and “C”.
Temperature Letter
This letter indicates a tire’s resistance to heat. The temperature grade is for a tire that is inflated properly
and not overloaded. Excessive speed, underinflation or excessive loading, either separately or in combina
-
tion, can cause heat build-up and possible tire failure. From highest to lowest, a tire’s resistance to heat is
graded as “A”, “B”, or “C”.
Additional Information on Light Truck Tires
Please refer to diagram to right.
Tires for light trucks have other markings besides those found on
the sidewalls of passenger tires.
LT
The “LT” indicates the tire is for light trucks.
Max. Load Dual kg(lbs) at kPa(psi) Cold
This information indicates the maximum load and tire pressure
when the tire is used as a dual, that is, when four tires are put on
each rear axle (a total of six or more tires on the vehicle).
Max. Load Single kg(lbs) at kPa(psi) Cold
This information indicates the maximum load and tire pressure
when the tire is used as a single.
Load Range
This information identifies the tire’s load-carrying capabilities and its inflation limits.
Snow Tires
In some heavy snow areas, local governments may require true snow tires, those with very deeply cut
tread. These tires should only be used in pairs or placed on all four wheels. Make sure you purchase snow
tires that are the same size and construction type as the other tires on your vehicle.
NHTSA TIRE INFORMATION (continued)
