| 摘要 |
PURPOSE: To make it possible to maintain a profile of a surface of a tread section uniformly even when light oil is sprayed by forming a shoulder face and a buttress face by an oil-resistant rubber layer made of a rubber component having a specific thickness and a specific mass change. CONSTITUTION: A shoulder face SH in an outer part on a surface of a tread section 2 and a buttress face B which is an external part of a side wall section 3 are formed by an oil-resistant rubber layer 9 which is bent at a tread end e and continuous in the circumferential direction of an oil-resistant tire. The thickness T of the oil-resistant rubber layer 9 is set to 2 to 10 mm. Moreover, the oil-resistant rubber layer 9 is made of an oil-resistant rubber component whose mass change is 60% or less when it is immersed in light oil having the temperature of 23±2 deg.C for 48 hours. The oil-resistant rubber layer 9 is made of a single body of acrylonitrile butadiene rubber or acrylonitrile butadiene rubber in which SBR is mixed. Consequently, swelling of a tread 2A to the outside in the radius direction can be made uniform even if light oil is absorbed through the shoulder face SH and the buttress face B.
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