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• 520ERV7 is the top-of-the-line racing chain for all types of motorcycle racing, on and off road
• Incredible design and utilization of D.I.D's patented X-Ring seal technology makes the ERV7 a top performing racing chain available
• Utilized by many factory teams worldwide
• The 520 ERV7 chain boasts a 3% higher tensile strength due to stronger inner side plates and thicker pins
• Due to increased X-Ring durability, the ERV7 sees a 13% wear resistance increase