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EK Chains 520 RXO QX-Ring H/Duty Narrow Gold 120L Race Chain


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Product Description

When second place isn't an option, choose an RXO series chain. The RXO's race proven design is a product of countless hours of testing and top level racing. The RXO features an incredibly narrow 18.9mm chain width without sacrificing strength or dependability, and incorporates the Quadra X-Ring design which increases chain life from 1.5 to 2 times longer than a standard O-Ring chain. The QX-Ring design also reduces friction by 40% compared to the standard O-Ring chain.

All EK Chains motocross chains utilize our CRH pin treatment which provides an extremely hard outside coating and softer inside to increase strength and reduce chain wear. Exclusive to EK Chains, the Chormium Carbide pin surface coating also offers superior impact and shock absorption while reducing oxidation caused by natural elements.

The 520 RXO also features lightening holes in the side plates to reduce the chain's overall weight by 3% without compromising tensile strength. These holes also extend the service life of the chain by dissipating heat and helping reduce dirt and mud build up.


  • Pin: Diameter 5.24mm Length 18.9mm
  • Roller: Diameter 10.16mm
  • Plate Thickness: Inner 2mm, Outer 2mm
  • Tensile Strength: 8,630 lbs.
  • Wear Life Index: 1000 (Std. as 100)
  • Weight (100 Links): 1.54kg
  • Max Disp. CC's: Street 600, Dirt 500

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