{HEAD ~ The tread} 12 is of {TAIL ~ any rubber tread compound} having a relatively low energy loss during stress cycles and being durable against wear, abrasion and aging 
{ HEAD ~ The tread } 12 is of { TAIL ~ any rubber tread compound } having a relatively low energy loss during stress cycles and being durable against wear , abrasion and aging
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL 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