Chain Type & Variant: RK 520ZXW, likely represented by the “Z” in 12-52Z-120 (i.e., 520 pitch, ZXW series, 120 links).
Sealing Technology: Uses XW-Ring seals (an advanced design with multiple sealing lips and lubrication reservoirs) to reduce friction, retain lubrication, and better resist dirt ingress.
Strength & Specs:
• Tensile strength is about 9,442 lbf (or in that region) for the 520 ZXW chain.
• Marketed for high-speed, high-HP machines, even up to ~1,200 cc.
Finish / Variants: Listed in gold, natural, black/black scale finishes.
Included Items: Rivet-style master link (joining link) is generally included with the chain.
Use Case / Application: Suited for high-performance/sport/road race usage where durability, low drag, and heat resistance are important.
