this is really part of the formed in the shape of the key, and to improve the stability of the car, but also to improve the performance of the brake and a pneumatic tire is able to provide for. in the past, the key is the appearance of the unit in a straight line in the above image formation, the depth of the deep. the key to improve the braking, the control stability, increase the depth of the target to keep the depth of limit is set. this design is to keep the depth of its own and is equal and the length of the long form to sikkim, control of the safety of the car and improve the braking performance of the tire is able to provide for the use of the key (10). the majority of support ( 11) of the waveform to form a zigzag form of organization.
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