| 摘要 |
A heavy duty pneumatic tire comprises a tread portion, a plurality of lug grooves formed in the tread portion so as to extend from a tread end toward an equator of the tire, and a central land portion formed between two circumferential lines passing through terminal positions of these lug grooves substantially in a circumferential direction of the tire, wherein the tread portion is made of rubber having a loss tangent at room temperature of 0.04~0.40, and has a given negative ratio at a region corresponding to at least 50% of a tread width around the equator and a given maximum groove depth of the lug groove located at a zone corresponding to at least 80% of the tread width around the equator, and a circumferential shallow groove is formed in the central land portion.
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