Heavy Duty Tire Tread Groove Design for Stone Ejection

The lug grooves are designed with curved configurations instead of straight lines. Specifically, the lug grooves extend in curved paths between the main grooves, creating smooth transitions that prevent stone accumulation. The curved geometry eliminates sharp corners where stones would otherwise be trapped, allowing stones to be more easily ejected while maintaining structural simplicity.

The central region of the tread is divided into multiple center blocks by providing lateral grooves between the main grooves. This segmentation creates additional drainage pathways for water evacuation while maintaining the overall groove pattern. The lateral grooves in the central region work together with the main grooves to improve wet grip without significantly increasing complexity.

The groove depth and width are optimized locally at different positions. The lug grooves have specific depth and width ratios that are tailored to their location, creating optimal drainage while minimizing stone contact pressure. The groove dimensions vary throughout the tread pattern to balance water evacuation needs with stone ejection requirements.

The center blocks are given five or more sided polygon shapes on their top surfaces, creating geometric configurations that enhance rigidity in multiple directions. This dimensional approach to block geometry allows the center blocks to maintain structural strength while the surrounding groove system provides adequate drainage pathways, separating the structural and drainage functions.