Choosing new tires, guided primarily by their size or, more correctly, standard size. He applied to the sidewall of the tire major characters, a combination which is as follows:
175/70 R13 82 T
175 - the width of a tire, mm70 - the height profile is shown as a percentage of width. In our case, the height is 70% of the width (175 mm), ie, 122.5 mm. Often referred to as a series of high profile. Some sizes serial number is missing, for example, 185 R14 C 102 Q. These tires are called full, and the ratio of height to width in this case is 80% or 82%.
R13 - the so-called radius of the tires - this is the diameter of the disk on which a tire of this size need to be installed. The letter R indicates a radial type tires.
82 - index or load factor. This is a conditional indicator, indicating the permissible tire load in kg. Deciphering the most commonly used coefficients given in Table load indices. Often, the load is solved on the very bus: the marking Max Load followed by two digits, the first kg, the second in pounds.
T - speed index. This figure indicates the maximum speed at which the manufacturer guarantees the inherent operational characteristics of tires. Explanation is given in the index table speed.
Some sizes have additional marks: 185 R14 C 102 Q, the index C denotes the so-called "enhanced" tires with big load. There are other signs, but very rarely.
In addition to the standard size on the sidewall of tires must specify the name of the manufacturer, for example, nokian and the model name of the tire, for example, NRT2.
Size 175/70R13
characteristics of tires:
Size (A) - width in mm. In this example, A = 175mm
size (B) - the height of the profile presented as the percentage ratio of height to width. In this example, B = 70% = 122.5 mm
Size (C) - rim size in inches. In this example, C = 13 inches = 330 mm
size (D) - the total height of the tire. D = 2B + C. In this example, D = 575 mm
In addition to these, there are other symbols that carry a lot of useful information:
TUBE TYPE - chamber design.
TUBELESS - Tubeless design.
TREADWEAR 380 - coefficient of wear resistance is determined with respect to the "base bus" for which he is 100.
TRACTION A - friction coefficient has values ??of A, B and C. Tires with a coefficient of A have the greatest amount of cohesion in its class.
TEMPERATURE A - temperature conditions, parameter characterizing the ability of the tire to withstand temperature shocks. He, like the previous one is divided into three categories A, B and C
E17 - compliance with European standards.
DOT - compliance with U.S. standards.
M + S (mud and snow), Winter (Winter), Rain (rain), Water or Aqua (water), All Season North America (all seasons in North America), etc. - Tires designed for use in specific circumstances.
PLIES: TREAD - the layer composition of the tread,
SIDEWALL - part of the sidewall layer.
MAX LOAD - Max load, kg / Pound.
MAX PRESSURE - the maximum inflation pressure, kPa.
ROTATION - the direction of rotation.
LEFT - tire mounted on the left side of the car. *
RIGHT - tire mounted on the right side of the car. *
OUTSIDE or Side Facing Out - the outer side of the installation. *
INSIDE or Side Facing Inwards - the inner side of the installation. *
* For tires with asymmetrical tread pattern.
DA (stamp) - minor manufacturing defects do not interfere with normal operation.
TWI D - a pointer to the wear indicator on the projector. Indicator itself is a protrusion on the bottom of the tread grooves. When the tread wears to a level that ledge, it's time to change a tire.
MADE IN JAPAN - producing countries.
Knowing these simple designations of any car owner can easily acquire and properly maintain tires
