Tire composition and performance:
Tires are composed of four main parts: cord layer, bead, buffer layer, and tread. The performance of tires basically depends on these four parts.
Function of tires
(1) Bear the mass of the vehicle itself and the load, and maintain its running performance
(2) Buffer the impact and vibration received by the vehicle during driving, and maintain the stability and smoothness of the vehicle.
(3) Ensure that the entire tire is in reliable contact with the ground, and play a role in improving the traction, passability and braking performance of the vehicle
Tire classification
Bias tires and radial tires
Bias tire (BIAS TIRE) The symbol represents (-), for example 2700-49
A tire structure that has been used for a long time, referring to the tire structure in which the cords that make up the tire body are at a certain angle to the direction of travel of the tire (about 38 degrees)
Radial tire (RADIAL TIRE)
The arrangement of the tire body cords is 90 degrees or close to 90 degrees to the direction of travel of the tire, and the tire uses a belt layer to increase strength.
Compared with bias tires, radial tires have the following characteristics
Good handling stability
Safe cornering performance
Good wear resistance
Less heat generation
Low rolling resistance, saving fuel costs
Strong traction, less slipping
Good riding comfort when driving at high speeds
Tube-type tire
A tire with an inner tube installed inside the tire and inflated for use
Composition: tire + inner tube + cushion belt + rim
Correct use and management method:
Choose an inner tube of appropriate specifications, and a new outer tire must use a new inner tube
-Radial tires should use radial tire inner tubes
Under no air pressure, if the width of the inner tube is deformed by more than 10%, it cannot be used
When inflating for the first time, first use low pressure to align the inner tube and cushion belt correctly, and then inflate with appropriate air pressure
Tubeless tire
A tire that does not use an inner tube, but uses a special rubber (airtight layer) on the inner surface of the tire instead of an inner tube to ensure the airtightness of the tire
. Composition: tire (airtight layer) + rim
During driving, even if a foreign object such as a nail pierces the inner tubeless tire, the air pressure will not drop quickly
Summer tire (SUMMER TIRE)
This type of tire is used in spring, summer and autumn when the temperature is above 0°. In order to be able to show excellent handling and braking performance on dry and wet roads, it is required to have a larger contact area with the ground to increase the friction between the tire and the ground. Therefore, most tread designs use simple block patterns to increase the contact area with the ground. Moreover, in order to enhance the drainage performance on wet roads, the grooves are mostly straight along the circumferential direction. Tires without special seasonal signs are summer tires.
All-weather tire (ALL SEASON TIRE)
This type of tire has the characteristics of both snow tires and summer tires, and its pattern is more complicated than that of summer tires. In order to provide superior braking and handling performance on snow, snow tires have more small grooves than summer tires, but all-weather tires cannot fully perform their braking performance on low-temperature and snowy roads. Therefore, it is safer to use special snow tires in similar areas.
SNOW TIRE or WINTER
A tire used only in low-temperature and snowy conditions in winter. The tread is designed with a block pattern with many small grooves, and the grooves are usually deep and wide to provide excellent braking and handling performance in winter. The tread rubber is a special formula that can withstand low temperatures and maintain its softness and good friction even in low temperature conditions. Studded tires were developed to improve braking and handling performance on ice, but since 1987, studless snow tires have been gradually replacing studded tires with their better performance, because studded tires have a lot of noise and air pollution. Recently, with the development of tire technology and raw materials, the performance of studless snow tires on ice has been further improved.
Tire assembly instructions
- Tires must be assembled on the specified vehicle model and rims. Special tools and instruments must be used to install and remove tires. Hard prying and hard smashing are strictly prohibited.
- The same axle should be equipped with tires of the same brand, specification, structure, pattern and ply level
- Bias tires and radial tires cannot be mixed.
- When assembling directional pattern tires, the rotation direction mark of the tire should be consistent with the vehicle’s driving direction
- When engineering machinery tires are installed in parallel, the difference range of the outer diameter of the two tires should comply with the following regulations
The allowable difference range of the outer diameter of the two tires when engineering machinery tires are installed in parallel: - Disassembly and assembly of tubeless tires
1 Before installing the tire, check whether the rim is deformed and cracked. If there is a problem, the rim needs to be repaired or replaced. When installing the tire, remove the rust and other debris on the rim surface, the bead low seat and the O-ring groove.
2 When disassembling and assembling tires with O-ring rims, lock rings are required.
