What does the D mean in ST205 75D15?
The D in a tire size of ST205/75D15 stands for bias ply and if you see the letter R in the tire size where the D is, that is a Radial tire. The D in 205/75D15 represents that the tire has a bias ply construction whereas the R in 205/75R15 represents that the tire has a radial ply construction.The D in a tire size of ST205/75D15 stands for bias ply and if you see the letter R in the tire size where the D is, that is a Radial tire.Answer. Sep 26, 2024 – 09:46 AM. The difference between ST205 75R15 and ST205 75D15 lies in the type of construction of the tire. The R in ST205 75R15 denotes a radial construction, while the D in ST205 75D15 signifies a bias ply or diagonal construction.R stands for “Radial” and the last two figures 15 indicate the wheel diameter in inches. The size ends with the load index 88, which is the maximum weight that each wheel can support, and the speed rating H, which is the maximum speed at which the tyre is approved for use.The D in 75D15 stands for diagonal or bias ply, indicating that the tire’s internal fabric layers are diagonally arranged, while the R in 75R15 stands for radial, meaning that the tire’s internal fabric layers are arranged radially from the center.
What does the D stand for in 205 75D15?
The D is the designation for the internal construction of the tire. The D stands for diagonal or bias ply construction. That means the tire body plies inside the tire will crisscross. The 15 is the wheel diameter in inches and the C after the tire size will designate the load range. Load range C and D refer to the weight capacity and air pressure level of tires, with D having a higher capacity than C.Load Range C: 6-ply rating, a common choice for medium-sized trailers. Load Range D: 8-ply rating, suitable for larger trailers or heavier loads. Load Range E: 10-ply rating, often used for heavy-duty trailers or commercial applications.
What’s the difference between D and R in tire size?
After the aspect ratio, there will generally be a letter – either R, D, or B. This refers to the internal construction of the tire. R stands for radial, the industry standard for most passenger vehicles today. D means diagonal construction, while B signifies belted bias construction. The sidewall is 75 percent of 205 mm. The D is indicating the tire is a bias ply tire as opposed to a radial tire.