Bridgestone Corporation

Bridgestone Americas Tire Operations, LLC

Masataka Uchiyama

Nobuo Shimizu

Taro Iwamoto

Jeffrey D Parker

Bradley J Harris

Dennis W Snyder

Samuel O Givens

Kevin J Kosmac

Yusuke Onishi

Steven M Sawyer

Leonard M Shoun

Matthew T Schreiner

Tire tread

A tire includes a circumferential tread constructed of a base material. The circumferential tread has a plurality of bars, each of the plurality of bars having a top surface and a plurality of side surfaces. The circumferential tread further has a plurality of valleys disposed between the plurality of bars. A reinforcement layer covers at least some of the plurality of valleys and an outer layer covers at least a portion of the reinforcement layer.

Tire with reinforced tread

It is an object to ensure the strength of a carcass line, enhance durability with respect to high applied loads, and be able to suppress the input of compressive force with respect to a carcass ply without increasing mass and cost. When W denotes a distance from a tire equatorial plane (CL) to a tire axial direction outermost point (P) of a carcass body portion (C) and D denotes a tire radial direction height from bead base portions () to a carcass body portion (A) at the tire equatorial plane (CL), a radius of curvature (R) of a carcass ply () in a range from the tire equatorial plane (CL) to a position (P) located 0.6 W away from the tire equatorial plane (CL) in the tire axial direction, a radius of curvature (R) of a carcass body portion (B) in a range from the position (P) to a position (P) located 0.7 D on the tire radial direction outer side from bead base portions (), and a radius of curvature (R) of the carcass body portion (C) in a range from the position (P) to a position (P) located 0.3 D on the tire radial direction outer side from the bead base portions are such that 0.07&#x2266;R/R&#x2266;0.11 and 0.5&#x2266;R/R&#x2266;0.7.

Agricultural tire

Growing community of inventors

Tokyo, Japan

Masataka Uchiyama