When is the light truck numeric sizing used?
This older sizing system is still used on older commercial vehicles. The tire size branded on the sidewall looks like this: 9.50R16.5SLT/D. In this example, the 9.50 represents the tire’s section width in inches; the R, radial construction; the 16.5, the rim diameter in inches; the LT, Light Truck and the D, the tire’s load range.