FIELD: transport.
SUBSTANCE: tire comprises tread band including first elastomer material of first rupture strength and multiple circumferential grooves formed in tread. Every said circumferential groove is composed by two lateral walls separated by bottom. At least, one of said grooves comprises protective layer from second elastomer material with second rupture strength applied on, at least, groove bottom. Second rupture strength-to-first rupture strength ratio makes, at least, 1.5.
EFFECT: higher rupture strength.
24 cl, 2 dwg, 2 tbl
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