DID has redesigned the 219v2 Racing Kart Chain to meet today's higher horsepower and endurance demands. The 219v2 features our race proven o-ring seal that locks in DID's specially formulated grease and guards against the invasion of dirt particles, and SDH hi-tech pin treatment that creates a chain with superior wear resistance. 30% greater wear performance than previous 219v, 10% greater tensile strength than previous 219v.