What does ST205 mean on a tire?
ST205/75R15 Here’s what it means: ST – Special Trailer tire. Width of the tire in millimeters. Aspect ratio (height of the sidewall as a percentage of width) R – Radial construction. 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 difference between a bias and radial ply is in regard to the directions of the cords.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.Expert reply: tire designations st205/75d14 and st205/75r14 are both for special trailer tires with a 205mm width, 75-percent aspect ratio and that fit a 14-inch wheel. The difference between them is the tire’s type of construction. The st205/75d14 tire is a bias ply type with a load range d rating.
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. Most trailer tires are only rated for a maximum speed of 65 MPH.Should trailer tires be inflated to max PSI? Trailer tires should be inflated to the maximum inflation designated on the tire’s sidewall to reach full load carrying capacity. Remember, the air within your tire is actually carrying the weight!
Is D or R better for trailer tires?
Answer. The choice between D or R trailer tires depends on your specific needs, as each has its own strengths. D (bias ply) tires have stiffer sidewalls and are generally more durable and resistant to punctures, making them suitable for heavy loads and rough terrains. For optimal performance, use 10-ply tires for smooth daily driving and moderate loads, which are comfortable and economical. Conversely, 12-ply tires are built to be more rugged, and hence the best choice for frequent heavy hauling and extreme off-road operation. Shane N.C and D load range tires are the most used when it comes to medium to larger-size trailers, but if you’re hauling a heavy-duty trailer, load range E tires are probably what you need.The higher the ply rating, the higher the carrying capacity. Before putting a set of tires on your vehicle, ensure the ply rating or load range meets or exceeds the recommendation on your vehicle’s door placard.
What does the D stand for on a trailer tire?
D: D is for tires built with diagonal (crisscrossed) plies, called bias-constructed tires. They are also called conventional, x-ply, or cross-ply tires. Some motorcycle and trailer tires still use this internal construction. A: The Letter R means Radial structure, while D means Bias structure. The Hi-Run LZ1004 (ST205/75D14 6PR) is a 6-ply rated Bias Trailer Tire.
What do R and D mean on tires?
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. For Cincinnati drivers, radial tires provide the best blend of ride comfort, handling, and tread wear. Traction: D tires provide superior grip under heavy loads, while R tires excel in lighter, recreational settings. Heat Resistance: D tires are more resistant to heat build-up, reducing the risk of blowouts during long trips. Wear and Tear: R tires may wear out faster under heavy loads compared to their D counterparts.
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.In the chart above, tire load ranges are arranged from A to G. A is equivalent to a 2-ply rating, while C equals a 6-ply rating.