(1) Bias Tire

Layers of one ply cord material are placed on the tire carcass diagonally from one tire bead to the other at angles of about 40° to the centerline of the tread. The long term research and development period has given this tire an overall steady performance and stiff sidewall. With the advent of the radial tire however, the bias tire is now used much less frequently.

(2) Radial Tire

A radial tire uses a cord angle of 90 degrees. That is, the cord material runs in a radial or direct line from one bead to the other across the tread. In addition, a radial tire has a belt overwrap under the tread surface to provide greater structural stability. The belt overwrap of a radial tire distortion while the radial structure enables high speed driving.

Note: Belted Bias Tire

A radial tire-like belt is attached to a bias tire carcass. The belt increases the stiffness of the improves traction for better steering and stability. However, the belted bias tire is generally produced from the transition of a bias structure to radial structure and is not widely used.

Advantages of a Tubeless Tire

- Maintains air pressure
- Sudden air leakage does not occur even with puncture
- Improved heat emission while driving because air inside the tire is in direct contact with rim
- Less maintenance or mishaps with tube
- Increased operation efficiency with no tube assembly

Disadvantages of a Tubeless Tire

- Separation occurs if crack appears inside tire bead- Air leakage in the case of imperfect tire-rim assembly or disfiguration in the rim flange. In particular, caution is needed when driving on unpaved roads as rocks and other debris may damage the rim flange and cause air leakage.

(3) Tubeless Tire

Structural comparison of tube/tubeless tire

As cars became faster, the tubeless tire was developed to protect drivers and cars from the dangers of flat tire accidents while driving at high speeds. Instead of using a tube, a lining (inner liner) of special rubber with low air permeability inside the tire prevents air leaks from the tire and rim. This means that even if a nail punctures the tire while on the move, air pressure will not be lost very rapidly.

However, careful tire maintenance is still necessary as there is no tire that does not go flat. In addition, there are tubeless tires that use airtight, highly binding cement on the inside of the inner liner to decrease air leakage even further.

(1) Summer Tire

As a tire for use in seasons without snow (spring, summer, fall), the summer or general tire is optimized for reduced noise, smooth driving and safe handling at high speeds.

(2) All Season Tire

Developed to relieve the difficulty of changing from summer tires to winter ones in regions with short snow seasons, the all season tire has more tread kerfs than the summer tire.

(3) Winter Tire

Winter tires provide good steering and are designed to have high braking and tractive force in snow. These characteristics are due to the treads with deep grooves which aggressively grab onto soft snow.When driving with winter tires, the snow that is stuck in the grooves of the tread is compressed in an up and down direction and hardened to form a firmsnow pillar. If winter tires are used in seasons without snow, wear occurs faster than for regular tires so it is more economical to change to regular tires once winter is over.