| 摘要 |
PURPOSE: A pneumatic snow tire for heavy load is provided to improve the snow performance of a tire by promptly discharging snow which is inserted into a tread block after touching the ground. CONSTITUTION: A pneumatic snow tire for heavy load comprises grooves(1), a block(2), and thread(3). The grooves are formed in the columnar direction of a tire. The block is arranged between the grooves and relatively protrudes based on the groove. The block is equipped with snow discharging grooves(4) at a regular interval in the columnar direction of the tire. A compressed air passage slopingly penetrates near the bottom of the snow discharging grooves. The compressed air passage is symmetrically formed in a convex surface(2a) in respect to the center of a snow discharging groove. The tread touches the surface of a road. |
