one secondary groove is provided outward of {TAIL ~ each third main groove} in the tire width direction, {HEAD ~ a groove width} of the secondary groove being narrower than that of the third main groove, and the secondary groove extending in the tire circumferential direction, 
one secondary groove is provided outward of { TAIL ~ each third main groove } in the tire width direction , { HEAD ~ a groove width } of the secondary groove being narrower than that of the third main groove , and the secondary groove extending in the tire circumferential direction ,
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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