UNDERSTANDING TIRE SIZES
The tread is the part of the tire that makes contact with the road's surface. Tread should have strong resistance to wear and cutting. It should also be strong enough to resist external impact and generate little heat.
Carcass refers to the internal cord layer of the tire that sustains load and absorbs shock. The carcass must have a strong anti-fatigue attribute that Inhibits bending and stretching during driving.
Bead wraps around the end part of the cord and connects the tire to the rim. Bead is composed of bead wire and a core rubber (APEX)
Belt is made of steel wire or fabric, and mitigates road impact while driving by widening tread part to improve driving stability.
Capply is a special cord adhered on the belt that improves performance while driving and prevents breakaway of belt.
Sidewall refers to the side part of the tire that protects the carcass and improves driving comfort by bending and stretching.
Shoulder refers to the area starting from the tread edge to the upper part of the sidewall. It requires excellent heat protection to be effective.
Groove on the tread improves steering stability, towing power, and braking performance.
Apex minimizes bead distraction and shock.
Inner Liner is adhered to the inner part of tire. It consists of a special rubber that prevents entry of air.
Kumho | Brand |
---|---|
DOT H2R8 YP2D 3302 | DOT stands for the US Department of Transportation.
H2 is the registration number of the manufacturing factory. The number ‘332’indicates week and YEAR manufactured. |
KU15 | Pattern NO |
RADIAL | Represents tire cord structure. This tire does not need tube. |
235/40 R18 91Y | Indicates size of tire. Put "P" before size to indicate that it is for PASSENGER vehicles.(in the U.S.) |
235 | Represents section width of tire. This tire's section width is 235mm. |
40 | Tire's ASPECT RATIO. This tire's ASPECT RATIO is 40. Often called '40 series.' |
18 | Rim Diameter (in inches) |
91 | Load Index (means 615kg) |
Y | Speed Symbol (means 300km/h) |
DOT H2R8 YP2D 3302 | DOT stands for the US Department of Transportation. H2 is the registration number of the manufacturing factory. The number ‘332’ indicates week and YEAR manufactured |
Load Capacity & Inflation Pressure | MAX.LOAD 615 Kg (1355 LBS) AT 350KPA (51PSI) MAX. PRESS Indicates maximum allowed air pressure and maximum allowed load. 51PSI is maximum allowed air pressure for this tire, and 615kg is maximum allowed load |
TREAD STEEL2 +POLYESTER1: | Represents structure and material of the tread part. This tire used two steel belts and one Polyester carcass cord. |
MADE IN KOREA | Country manufactured and KS authorization |
The ASPECT RATIO refers to the ratio of height to section width of tires. In the past, most of the tire's ASPECT RATIO was 100/meaning that the tire's height and width are the same. Recently, However, the ratio tends to gradually go down to 80,70,65,60, etc. Lately, wide tires became very popular, and the tire unit is in series. Thus, tires with the ASPECT RATIO of 70 are called '70 series tires.