Layers of one ply cord material are placed on the tyre carcass diagonally from one tyre 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 tyre an overall steady performance and stiff sidewall. With the advent of the radial tire however, the bias tyre is now used much less frequently.
A radial tyre 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 tyre has a belt overwrap under the tread surface to provide greater structural stability. The belt overwrap of a radial tyre distortion while the radial structure enables high speed driving.
A radial tyre-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 tyre is generally produced from the transition of a bias structure to radial structure and is not widely used.
- Maintains air pressure
- Sudden air leakage does not occur even with puncture
- Improved heat emission while driving because air inside the tyre is in direct contact with rim
- Less maintenance or mishaps with tube
- Increased operation efficiency with no tube assembly
- Separation occurs if crack appears inside tyre bead- Air leakage in the case of imperfect tyre-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.
As cars became faster, the tubeless tyre 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 tyre prevents air leaks from the tyre and rim. This means that even if a nail punctures the tyre while on the move, air pressure will not be lost very rapidly.
However, careful tyre maintenance is still necessary as there is no tyre that does not go flat. In addition, there are tubeless tyres that use airtight, highly binding cement on the inside of the inner liner to decrease air leakage even further.
As a tyre for use in seasons without snow (spring, summer, fall), the summer or general tyre is optimized for reduced noise, smooth driving and safe handling at high speeds.
Developed to relieve the difficulty of changing from summer tyres to winter ones in regions with short snow seasons, the all season tyre has more tread kerfs than the summer tyre.
Winter tyres 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 tyres, 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 tyres are used in seasons without snow, wear occurs faster than for regular tyres so it is more economical to change to regular tyres once winter is over.