Pneumatic radial tire for heavy load
A technology for radial tires and treads, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc., and can solve the problems of degraded tread contact surface wear resistance, reduction, groove bottom cracking, etc.
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[0064] prepared respectively with figure 2 and image 3 Block pattern of the construction shown and a radial tire of size 46 / 90R57. For each of the Example tires 1 and 2 according to the present invention and the Comparative example tire in which the characteristics of the tires were changed as shown in Table 1, the sliding amount of the kick-out end portion of the block was measured.
[0065] Since the Comparative Example tires required no change from the Example tires except that the groove walls of the lug grooves should have a conventional structure, the Comparative Example tires were prepared in substantially the same manner as the Example tires.
[0066] Table 1
[0067]
[0068] Each of the Example tires 1 and 2 and the Comparative Example tire was fitted with a rim of 1.45 (m)×0.74 (m) (57 (inch)×29 (inch)) and inflated under an internal pressure of 700 kPa. Each tire was rotated with a load mass of 62000 kg applied thereto, and the amount of sliding of the kick...
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