## DID 420NZ3 Drive Chain, up to 150ccm - Strength and Reliability The DID 420NZ3 drive chain is the successor to the NZ2 model, a reinforced, non-O-ring chain designed for the toughest applications in vehicles up to 150cm³. Manufactured using advanced SDH technology, it guarantees exceptional durability and wear resistance. ### SDH Technology - The Heart of Strength The SDH (Special D.I.D Heat Treatment) system is the key to the exceptional strength of the 420NZ3 chain. It involves creating an extremely hard chrome-carbon outer layer on the inner pins while maintaining a soft core. This gives the pins tremendous impact resistance, absorbing shocks and minimizing the risk of damage. ### Wear Resistance The 420NZ3 chain exhibits exceptional resistance to wear caused by the friction of foreign materials that enter the chain during operation. This is due to the SDH system and the precise manufacturing of each component. ### Technical Parameters - Size 420 The 420NZ3 chain meets the 420 size standard, which means: * Roller pitch: 12.7mm * Width: 6.35mm * Roller diameter: 7.75mm ### Tensile Strength The 420NZ3 chain has an average tensile strength of 22000N, guaranteeing safe and reliable operation. ### DID Brand - Synonym for Quality DID is a renowned manufacturer of drive chains, known for the high quality of its products. By choosing the DID 420NZ3 chain, you are investing in proven technology and long-lasting performance.