RK Chain GB530XRE x Gold XW Ring Meet Meryl Streeps daughter, Grace Gummer, who plays Caroline Kennedy. RK 525XRE and 530XRE are designed with the concept of From the Circuit to the Street." Not only suitable for general street riding but also for racing performance. High durability and lightweight. Developed with FIM Endurance World Championship (EWC) champion teams. RK XRE chains feature RK`s only technology of XW Ring, which has two lubrication pools, three contact lips, and a triple barrier structure to seal the lubrication further and prevent debris from entering the chain. The durability has been dramatically improved from the XSO series. Specifications: Tensile Strength: 44. 0 Kn 9,900 lbs Max CC Racing: 1400cc Street 1100cc Off road Max Horsepower: 205 HP Weight: 2. 11 kilos Max Chain Width: 24. 5mm Masterlink Included: Rivet