Pneumatic tire and method of manufacturing same
A technology for a pneumatic tire and a manufacturing method, applied in the field of pneumatic tires, can solve the problems of insufficient absorption of shock or vibration, deterioration of ride comfort, etc., so as to maintain ride comfort, improve bending rigidity, and restrain rigidity from becoming excessive. high effect
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[0090] Manufactured as figure 1 Tires of the basic construction shown and with tread inward ribs and / or main groove inward ribs as shown in Table 1 were evaluated for their performance. In addition, for comparison, the same test was also performed on a tire (Comparative Example 1) that did not have tread inward ribs and main groove inward ribs. Among them, the common specifications are as follows.
[0091] Tire size: 215 / 45R17
[0092] Rim size: 17×7J
[0093] Maximum tread thickness W3: 10mm
[0094] Tread:
[0095] Width W4a of central tread: 20mm
[0096] Width W4b of middle tread: 25mm
[0097] Width W4c of the shoulder tread: 30mm
[0098] Main ditch:
[0099] Maximum width W1: 10mm
[0100] Groove depth D1: 8mm
[0101] The inner area of the main groove:
[0102] Width W7a of the area inside the central main groove: 10mm
[0103] Width W7b of the area inside the shoulder main groove: 8mm
[0104] The test method is as follows.
[0105]
[0106] Each tes...
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