The radial pneumatic tire of this invention has {HEAD ~ a reduced bead mass} and {TAIL ~ improved rolling resistance} 
The radial pneumatic tire of this invention has { HEAD ~ a reduced bead mass } and { TAIL ~ improved rolling resistance }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL