EK 520 NX-Ring Super H/Duty Chain 120L (10)

When reliability isn’t optional, the EK 520 NX-Ring Super Heavy-Duty Chain delivers the performance you demand. Built for riders who push their machines, this 520-pitch chain features NX-Ring seals that keep lubrication where it matters and minimize friction, so you get consistent power transfer, smoother operation, and longer life in wet, dusty, or muddy conditions.

The NX-Ring advantage isn’t just marketing talk. The X-shaped seals create a tight barrier against contaminants while preserving lubrication inside each link. The result is less slack, quieter operation, and fewer maintenance cycles between adjustments—even on demanding rides or extended tours.

Durable construction you can trust. Each chain is engineered from high-strength alloy steel and designed for heavy-duty use, with robust inner and outer plates to handle aggressive riding, rugged terrain, and race-inspired setups. At 120 links per chain, this configuration is optimized for common 520 drivetrain layouts without requiring extra rivets or extensions. This listing includes a 10-chain pack, making it easy to equip multiple bikes or keep a ready supply on hand.

Why this chain stands out

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  520 pitch compatibility: widely compatible with mid-size street, sport, and dirt bikes that run a 520 chain.


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  NX-Ring seals: enhanced lubrication retention and reduced friction for longer chain life and smoother shifting.


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  120-link length: ready-to-use length for typical 520 setups, simplifying installation.


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  10-chain pack: cost-effective, convenient replacement options for garage or shop use.


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  Heavy-duty design: built to withstand aggressive riding, demanding terrain, and long-lasting performance expectations.

Ideal for riders who demand unwavering reliability across daily commutes, weekend trails, and track sessions. Pair with a compatible rivet tool and master link for installation, and follow regular lubrication and tension checks to maximize longevity and maintain peak performance.

Specifications at a glance

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  Chain pitch: 520


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  Links per chain: 120


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  Quantity: 10 chains per pack


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  Technology: NX-Ring sealed


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  Material: high-strength alloy steel


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  Recommended use: motorcycles and dirt bikes requiring a 520 chain with 120 links