Pneumatic tire therad with wide central groove and arcuate grooves

摘要

A high speed radial passenger vehicle tire having an aspect ratio of not greater than about 60. The ground-engaging tread portion of the tire comprising a wide substantially straight extending depression in the central portion of the tread having a contact width equal to or greater than 10% of the contact width of the ground-engaging tread portion. The tread portion is also provided with a plurality of substantially axially extending grooves extending from each side of said groove to the respective tread edge. The tread portion has a net to gross in the range of 50 to 65, a width equal to or greater than approximately 90% of the maximum tire section width and a cross-sectional radius greater to or equal than the circumferential radius of the tire. The wide groove and axially extending grooves having a depth no greater than approximately 0.25 inches.