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RK 428HSB-138-CL Transmission Chain — Reinforced chain of Heavy Duty Non-O type, designed for off-road use (enduro, motocross). Made from carbon alloy steel, each component is heat-treated and then shot-peened to increase wear resistance. A chain without O-rings, cost-effective and suitable for intensive sessions on muddy or stony tracks.
Manufacturer reference: 428HSB-138-CL
Brand: RK
Type: Drive chain – Heavy Duty Non-O (without O-rings)
Number of links: 138 links
Material: Carbon alloy steel, heat treatments and shot peening
Weight: 1.01 kg / 100 links
Colour: Natural
Recommended max displacement: 125–200 cc (depending on installation)
Accessories: Quick clip attachments included
The RK 428HSB chain is pre-tensioned and pre-stretched to limit initial elongation and provide a more stable fit upon installation. Ideal for sprockets and crowns subjected to strong accelerations and hard terrains, it represents a balanced choice between robustness and cost. Reminder: in the non-O version, regular maintenance and lubrication are recommended to preserve the longevity and reliability of the transmission.
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