If a tire DOT ends in only three (3) digits, the tire was manufactured before January 2000 and should be removed from service and be scrapped because it is over 10 years old. The last four digits are numbers identifying the week and year of manufacture (example: "0309" means the third week of the year 2009). The first two characters are the factory code indicating where the tire was made. Next to these letters is the tire identification number (TIN) – also known as the tire “serial” number. Follow tire inflation pressure recommendations on the vehicle’s tire placard, certification label, or in the owner’s manual.ĭOT MA L9 ABCD 0309 – The “DOT” symbol certifies the tire manufacturer's compliance with U.S. Sidewall markings are given in both metric and English Engineering units. Max Load Dual 1260 kg (2778 lbs) at 550 kPa (80 psi) Max Pressure Cold – (Light Truck Example) Indicates the maximum load of the tire and corresponding maximum cold inflation pressure for that load when used in a single or dual configuration. Max Load Single 1380 kg (3042 lbs) at 550 kPa (80 psi) Max Pressure Cold Follow tire inflation pressure recommendations on the vehicle’s tire placard, certification label, or in the owner’s manual. Max Load 730 kg (1609 lbs) and 240 kPa (35 psi) Max Pressure Cold –(Passenger Example) Indicates maximum load and maximum cold inflation pressure of the tire. The load range identifies the tire's load and inflation limits. LT245/75R16 120/116Q Load Range E – (Light Truck Example) Size marking, service description (load index and speed symbol), and load range for a metric light truck tire. P225/60R16 97T – (Passenger Example) Size marking and service description (load index and speed symbol) for a P-Metric speed-rated passenger tire.
Speed Symbol - The speed symbol is also known as a “speed rating.” The load index should not be used independently to determine replacement tire acceptability for load capacity. Load Index - The load index is a numerical code associated with the maximum load a tire can carry at the speed indicated by its speed symbol under specified service conditions. It shows the brand and model name of the tire, its size, whether it is tubeless or tube type, the maximum load and the maximum inflation, safety warning(s), and much more. Tires have very useful information molded onto their sidewalls.
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