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520 Factory Outlet Xring Racing Motorcycle Chain Same Performance as 520gxw Street/Track Dual Use. Extended Service Life: X-ring oil seal lasts 1.5x longer than standard O-ring seals for enhanced durability. Premium Alloy Steel: Made from high carbon alloy steel with heat treatment for superior tensile strength. OEM & ODM Customization: Supports full customization including color, type, and specifications for OEM/ODM needs. ISO 9001 Certified: Manufacturing process and quality control certified under ISO 9001:2001 standards. Low Friction Design: Advanced sealing technology reduces friction, wear, and ensures quiet operation. Universal Compatibility: Matches all types of motorcycle sprockets available in the global market.