Provided is a heavy duty tire having improved chipping resistance on a road surface with poor road conditions. A heavy duty tire having a tread portion, the tread portion including a first layer constituting a tread surface and a second layer located on an inner side of the first layer, the tread surface has a plurality of main grooves continuously extending in the circumferential direction of the tire, lateral grooves extending in the axial direction of the tire from the main grooves, and blocks partitioned by the main grooves and the lateral grooves, the blocks have sipes, and when the depth (mm) of the sipes is D and the thickness (mm) of the first layer is H, D and H satisfy the following relational expressions: D/H < = 0.95 (1), the rubber composition constituting the first layer contains a rubber component and a filler, the rubber component containing an isoprene rubber, and the filler containing carbon black and silica.
提供一种在路况差的路面上的耐掉块性能得到提高的重载用轮胎。一种具有胎面部的重载用轮胎,所述胎面部包括构成胎面表面的第一层和位于所述第一层的内侧的第二层,其中,所述胎面表面具有:在轮胎周向上连续延伸的多条主沟、从所述主沟起在轮胎轴向上延伸的横沟以及由所述主沟和所述横沟划分的花纹块,所述花纹块具有刀槽花纹,在所述刀槽花纹的深度(mm)为D,所述第一层的厚度(mm)为H时,D和H满足以下关系式:D/H≤0.95(1),构成所述第一层的橡胶组合物包含橡胶成分和填料,所述橡胶成分含有异戊二烯系橡胶,所述填料含有炭黑和二氧化硅。
Heavy duty tire
重载用轮胎
2024-01-02
Patent
Electronic Resource
Chinese
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen |