That is because the present invention makes the length of {HEAD ~ each first block} 5 in {TAIL ~ the tire circumferential direction} longer than the length of each second block 6 in the tire circumferential direction, and concurrently because the sub groove 7 provided in each first block 5 is not allowed to communicate with the first main groove 2A 
That is because the present invention makes the length of { HEAD ~ each first block } 5 in { TAIL ~ the tire circumferential direction } longer than the length of each second block 6 in the tire circumferential direction , and concurrently because the sub groove 7 provided in each first block 5 is not allowed to communicate with the first main groove 2A
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH