Performance Racing Core (PRC) - reinforced internal structure reduces sidewall flex for instant steering response.
Rival S v1.5 is legal for amateur autocross and time attack competiton with most sanctioning bodies in the USA and Canada.
Enhanced 'S': compound offers maximum dry performance, sacrificing some wear, while still exceeding UTQG 200 standards.
Rival S v1.5 offers internal construction enhancements for improved turn-in and transtional handling.
DOT Legal UTQG 200 semi-competition tire legal for SCCA Solo, SCCA Pro Solo, Goodguys Pro Touring, and One Lap of America competition.
Updated for 2017 v1.5 uses the same time tested Rival S compound for quick warm-up in autocross and time attack competition.