EK Chain 520 RRX Chain The EK RR chain is designed for racing enthusiasts, boasting a X-ring type design. This innovative approach results in reduced friction, delivering enhanced performance on the track. Features: CRH pin Lightening holes Can be used for street or dirt Max cc: 1000 for street, 750 for dirt Tensile strength: 8500 lbs. Quadra X-ring seal Rivet-type master link