What are the model specifications of semi-trailer tires?
2 Answers
Semi-trailer tire model specifications include 12R22.5 tubeless tires, 11.00R(-)20 steel wire tires (bias tires), with a diameter of 1085mm; 11R22.5 tubeless tires, 10.00R(-)20 steel wire tires (bias tires), with a diameter of 1055mm; 12.00R(-)20 steel wire tires (bias tires), with a diameter of 1125mm. Below is the relevant introduction: Domestic standards: According to domestic standards (GB/T2978—1997), there are 11 types of truck tires. For micro and light truck tires, there must be ULT (micro vehicle tires) or LT (light truck tires) marks at the end of the designation, while medium and heavy truck tires do not have these marks. Examples include the designation for micro truck conventional section bias tires; the designation for light truck conventional section bias tires; and the designation for light truck conventional section radial tires, such as 6.00R16LT. Tire introduction: Tire diameter refers to the rim base diameter that supports the tire bead, rounded to the nearest half-inch value, such as 22.5 inches. Tire outer diameter is the diameter of a new tire without load (measured as the diameter length of the outer tire relative to the tread).
I've been driving semi-trailers for over a decade, and tire specifications are absolutely crucial. Common ones include 12R22.5 and 315/80R22.5. For example, in 12R22.5, the '12' represents the cross-section width, 'R' indicates radial construction, and '22.5' is the rim diameter. Every digit matters—even a slight difference in diameter can make the wheel impossible to mount. You also need to consider the wheel position: steer axles use rib patterns to prevent skidding, while drive axles use large angled tread blocks for better traction. When hauling heavy loads, I pay extra attention to the Load Index on the tire sidewall, like 137/135, which means each tire can bear at least 3.5 tons. For loads over 30 tons, you need tires with these specs. Recently, with the hot weather and long hauls, I specifically switched to summer tires with better heat dissipation. You can never be too careful with tires.
