Premium quality O-RING kart chain, using SDH technology for a greater wear resistance and longer chain life. DID has redesigned the 219-V2 Racing Kart Chain to meet today’s higher engine performance and endurance demands. SDH hi-tech pin treatment creates a chain with superior wear resistance. DID 219-V2 features our race proven O-Ring seal that locks in DID’s specially formulated grease and guards against the invasion of dirt particles Longest lifetime and lowest friction of all produced 219 D.I.D chains Perfect for high horsepower classes such as Rotax or X30 Higher tensile strength and less resistant to stretching