Pneumatic tire

Abstract

Abstract PURPOSE:To improve tractive force of a vehicle and prevent a tire from easily generating an external flaw of chips or the like, by forming a tread pattern provided with many lugs of specific shape to the pneumatic tire used for the small construction vehicle running on the loamy soil of large water content. CONSTITUTION:In a tire of 30in. or less nomical rim diameter and less than 80% flatness, many lugs 3, consisting of the lug diagonal directional parts 3 (i) formed in the diagnoal direction with respect to a tire equatorial part TE from a tread side end part SL to a quartered part of tread width in the vicinity of a point QL and the lug transverse directional part 3 (t) folded toward the tire equatorial part TE from said point QL, are separated by grooves 4, and a tread pattern is arranged so that the lug transverse directional parts 3 (t) are overlapped. Groove edges 5 are chamfered to a curved face of 1mm. or less radius, and the tread pattern is formed to be in 0.30-0.38 overlap ratio eP/Tw of the lug 3, 0.25-0.45 ratio Lt/2XTw of the central lug part, 25-32 coefficient of groove edge projection length and 1.25-1.65 groove sectional area ratio Ss/Sq.

Inventors

• 👤 Sumio Onishi
• 👤 大西　澄夫

Bibliographic Details