Pneumatic tire, has tread made up of blocks divided by circumferential and transverse grooves, each block having transverse, zigzag grooves dividing it internally into tetrahedral projections and recesses

摘要

Pneumatic tire has a tread made up of blocks divided by circumferential and transverse grooves. Each block has transverse, zigzag grooves (7) which divide it internally into tetrahedral projections and recesses (a, a', b, b').