As we all know, car tires are divided into two categories: high pressure tires and low pressure tires. Due to the poor elasticity of high-pressure tires and the poor heat dissipation performance of the tire wall, they are basically no longer used in modern cars. Low-pressure tires are divided into two types: radial tires and bias-ply tires. Which of these two tires is better? What is the difference between them?
1. The fundamental difference between radial tires and bias tires is the carcass. The carcass is the foundation of the tire, which is composed of layers of cords. The carcass of a bias tire is a cord ply crossed by diagonal lines, while the carcass cords of a radial tire are wound side by side, and the top layer of the carcass often has two layers of belts made of steel wires.
2. From the design point of view, bias tires have many limitations. Due to the strong friction of the crossed cords, the carcass is prone to heat, which accelerates the wear of the pattern, and its cord layout cannot provide excellent handling and performance. Comfort; while the belt layer in the radial tire has good flexibility to adapt to the irregular impact of the road surface and is durable. Its ply construction also means the car has much less friction in motion than bias lines, resulting in longer tread life and better fuel economy.
3. The characteristics of the radial tire itself make the tire tubeless possible. A recognized advantage of tubeless tires is that when the tire is punctured, it does not burst like a bias tire with an inner tube but enables the tire to maintain air pressure for a period of time, which improves the driving safety of the car.
4. Radial tires have better grip. Due to the special carcass structure of the radial tire, the car can grip the ground firmly and effectively when driving. Therefore, the car of the same model has better handling and comfort if radial tires are used than bias tires.
Because radial tires have the above advantages compared with bias tires, most cars now use radial tires, and radial tires have also developed rapidly.
Radial construction tires:
Radial constructed tires utilize ply cords that extend from bead to bead at approximately right angles to the centerline of the tire. They are parallel to each other, and are combined with stabilizer belts.
Advantages: The result is longer tread life, better steering control, lower rolling resistance and fuel savings. Radial tires are best suited for those looking for smoother rides, longer tread life, and higher speed riding.
Disadvantage: Radials tires itend to be more expensive than bias tires, mainly because they cost more to produce initially. However, this is also largely offset by the increased tire life and longevity.
Bias construction tires:
Bias tires typically have the ply cords that extend diagonally from bead to bead at a range of 30 to 40 degree angles. Each successive ply is laid at an opposing angle, forming a criss-cross pattern.
Advantages: The end result is a design that allows the entire tire body to flex, as the tread and sidewalls share the same casing plies. The flex allows for better gripping, better clean out, and conformity to rough and rocky terrain. Bias type tires are best suited for extreme off-road condtions where grip, cleanout, and traction are top priority.
Disadvantages: This tire flex in the bias constructed tire is also its major disadvantage, depending upon the application. Bias tires tend to wear out quicker and form flat spots compared to their counterparts. The flexing also means increased rolling resistance, and less control and traction at higher speeds.
Summary:
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Advantages
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Disadvantages
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