X FIT HT | Highway Terrain SUV & Light Truck Tires | Laufenn Canada (2024)

Tire Structure

Tread, shoulder, sidewall, bead, carcass, belt, inner liner, and other components are structurally connected to complete the scientific structure of a tire.

Tread (the part that has direct contact with the road surface)

The tread consists of a thick layer of rubber which comes into direct contact with the road surface. It is highly resistant to fracture and shock in order to protect the carcass and belt located in the tire’s interior. Also, rubber with strong anti-inner abrasion features is used to increase the tire’s driving lifespan.

Shoulder (the shoulder of the tire)

Located between the tread and sidewall, the shoulder is the thickest part in a tire. Because of this, the shoulder is designed to quickly and easily dissipate heat that accumulates inside the tire while driving.

Sidewall (the side (lateral part) of the tire)

Located between the tire’s shoulder and bead, the sidewall protects the carcass on the inside and provides a comfortable riding experience due to its flexibility during driving. Also, the type of tire, size, structure, tread pattern, manufacturer, brand name, and other detailed information are marked on the sidewall.

Bead (the part that is in contact with the rim)

The bead wraps around the end of the cord and fixes the tire to the rim. It is made up of various parts including the bead wire, core, rubber and flipper. In general, the rim is slightly tightened so in the case of sudden reduction of air pressure while driving, the tire will not become unfastened from the rim.

Carcass (the framework of the tire )

The carcass is the framework of the tire, the most important part. The carcass refers to all layers made up of tire cord. It absorbs the tire’s internal air pressure, weight and shock.

Breaker or Belt (the layer in between the tread and carcass)

The breaker is a cord layer placed in between the tread and carcass in a bias tire to protect the carcass. It absorbs external shock and prevents splintering or injury to the tread from coming into direct contact with the carcass. At the same time, the breaker prevents the separation of the rubber layer and carcass. The belt is a strong reinforcement layer located in the circumference in between the tread and carcass in radial tires. The belt’s functions are similar to those of the breaker but it also reinforces the strength of the tread by firmly tightening the carcass.

Inner Liner

The inner liner substitutes for the tube in the tire’s interior and consists of rubber layer with low air permeability. The rubber layer generally consists of butyl, synthetic rubber, or polyisoprene type. The main function of the inner liner is to hold high-pressure air inside.

Tire Sidewall

A tire’s sidewall protects the carcass on the inside and provides a comfortable riding experience due to its flexibility during cornering. Also, the type of tire, size, structure, tread pattern, manufacturer, brand name, and other detailed information are marked on the sidewall.

DOT (Department of Transportation)

X FIT HT | Highway Terrain SUV & Light Truck Tires | Laufenn Canada (1)

Tire Size

Tire size notation is dependent on vehicle type but primarily consists of symbols and numbers denoting tire width, aspect ratio, diameter, load index and speed symbol that indicate tire performance.

Safety Warning

This indicates important information related to tire use.

Place of Origin

This indicates the region where the tire was manufactured.

Size & Specs

The selection criteria for tires change depending on the type of vehicle you own and your style of driving. For a pleasurable driving experience, it is important to take these factors into consideration when selecting an appropriate Laufenn tire product.

Tire Section Width

Distance (mm) in a straight line between the sidewalls fitting to rim with standards air pressure and without loads.

Tire Section Height

Half of a distance which is difference between tire’s outer diameter and rim diameter.

Aspect Ratio

The ratio of Section Height to Section Width.
*Aspect Ratio = (Height) / (Width) X 100

Rim Diameter

The distance between the rim bases in contact with the rim flange (almost identical to the tire’s interior diameter).

Tire Overall Diameter

Outer diameter of tire fitting to rim with standards air pressure and without loads.

Load & Speed

The symbol that shows a tire's performance level consists of two parts:tire performance is marked by Load Index (LI) and Speed Symbol (SS). LI refers to the maximum load that one tire can support, and SS refers to the maximum speed that a tire can handle.

Load Index

Load index is a numerical code stipulating the maximum load each tire can carry. For example, if the load index is 100, it means that a tire can carry a load up to 800kg.

Speed Symbol

Speed symbol indicates the maximum speed at which the weight (with the exception of weight when speed is equal to or exceeds 210 km/h) designated by the manufacturing company can be supported by the tire.

X FIT HT | Highway Terrain SUV & Light Truck Tires | Laufenn Canada (2024)

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