The alphanumeric code found on a tire’s sidewall provides crucial details about its specifications. Specifically, a numerical value followed by a letter indicates the tire’s load index and speed rating. The numerical value, in this instance ‘116’, represents the maximum weight the tire can support when properly inflated. This value correlates to a specific weight in kilograms, obtained through a load index chart. The letter, ‘T’ in this case, signifies the maximum speed at which the tire can safely operate under that maximum load. For example, ‘T’ corresponds to a maximum speed of 190 km/h (118 mph).
Understanding these ratings is paramount for vehicle safety and performance. Using tires with an insufficient load index can lead to tire failure, particularly when carrying heavy loads or towing. Exceeding the designated speed rating can also compromise the tire’s structural integrity, potentially causing a blowout. Historically, these ratings were developed to standardize tire capabilities and ensure drivers could select appropriate tires for their vehicles and driving conditions, contributing significantly to road safety.