Tire tread with circumferential and lateral grooves having asymmetrical cross-section
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United States of America Patent
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-
Mar 4, 2008
Grant Date -
Aug 31, 2006
app pub date -
Feb 25, 2005
filing date -
Feb 25, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pneumatic tire for dirt track racing comprising lateral and circumferential grooves forming blocks on the tread surface. The blocks have leading and trailing edge walls. The trailing edge walls of the blocks are buttressed by inclining the walls at an angle of 20.degree.-60.degree. relative to a line perpendicular to a tangent to the tread, and the edge wall extends into the groove by a distance of approximately one-half the tread width. The leading edge walls of the blocks have a radially outer portion inclined at about zero degrees and a radially inner portion have a radius of curvature of infinity or less, wherein the intersection point between the two portions is at about one-half the groove depth.
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