Birch, Stewart, Kolasch & Birch, LLP
Pneumatic tire
A pneumatic tire comprises a tread portion divided into a crown land region, two middle land regions and two shoulder land regions. The crown land region and middle land regions are each divided into triangular blocks by axial grooves arranged in a zigzag fashion. The shoulder land regions are each divided into shoulder blocks by axial grooves extending at an angle of not less than 70 degrees. The shoulder block is subdivided into an axially inner part and an axially outer part by a secondary groove extending at an angle of not more than 10 degrees. The outer part is provided with sipes extending at an angle of not less than 70 degrees, each angle with respect the circumferential direction.
Sumitomo Rubber Industries, Ltd.
B B B B B B
B60C B60C B60C B60C B60C B60C
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Hiroshi
Yamada