{"product_id":"did-520-ert3-racing-chain-120-link-gold-non-o-ring-37-kn-tensile","title":"DID 520 ERT3 Racing Chain 120-Link Gold — Non-O-Ring, 37 kN Tensile","description":"\u003cp\u003e\u003cstrong\u003eThe DID 520ERT3-120 is a lightweight, 120-link non-O-ring racing chain engineered for increased shock resistance and higher tensile strength without added mass.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis high-performance Ert3 series chain from DID upgrades race-day reliability by combining advanced pin treatment and cold-formed solid bushing technology. It delivers improved shock absorption and wear life compared with the prior Ert2 generation while keeping the overall chain weight steady—ideal for riders seeking stronger, more durable drivetrain components without sacrificing agility.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the Ert3 chain improve shock resistance during aggressive riding?\u003c\/h3\u003e\n\u003cp\u003eThe Ert3 gains roughly 25% better anti-shock performance by using a proprietary pin treatment that forms a hard chromium-carbide surface while preserving a softer inner core. That combination helps the pin resist surface damage yet absorb impact forces that occur under heavy loads or jumps.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSDH pin treatment creates a hard exterior and ductile interior\u003c\/li\u003e\n  \u003cli\u003ePin and bushing geometry tuned to reduce shock transmission\u003c\/li\u003e\n  \u003cli\u003eNon-O-ring design minimizes drag for race-focused setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the chain stronger without adding weight?\u003c\/h3\u003e\n\u003cp\u003eDID increased tensile strength by around 5% versus the Ert2 while keeping plate thickness and overall mass unchanged. The result is a 37.0 kN (approximately 8,300 lb) tensile rating achieved through material selection and precision manufacturing rather than bulk.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e37.0 kN tensile strength for high-load reliability\u003c\/li\u003e\n  \u003cli\u003e2.0 mm inner and outer plate thickness maintained for weight control\u003c\/li\u003e\n  \u003cli\u003eOptimized pin dimensions: 17.6 mm length and 5.34 mm diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does cold-formed solid bushing technology affect wear life?\u003c\/h3\u003e\n\u003cp\u003eCold-formed solid bushings produce a smooth, round internal surface that resists abrasion and promotes even contact with rollers and pins. The improved roundness and hardness distribution reduce uneven wear, extending usable life under racing conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSeamless round bushings for consistent contact and less wear\u003c\/li\u003e\n  \u003cli\u003eHigh wear resistance suited for frequent, high-RPM use\u003c\/li\u003e\n  \u003cli\u003eDesigned to maintain chain geometry under stress for longer service intervals\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat installation and compatibility details should I know?\u003c\/h3\u003e\n\u003cp\u003eThe 520ERT3-120 ships as a 120-link non-O-ring chain and includes a clip-style (RJ) master link for assembly. Its 520 pitch is compatible with motorcycles and race setups designed for 520-series chains; check sprocket tooth counts and clearance before fitting.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes clip-style RJ master link for secure joining\u003c\/li\u003e\n  \u003cli\u003e120 links total — trim to fit per manufacturer instructions\u003c\/li\u003e\n  \u003cli\u003e520 pitch size; verify sprocket compatibility and chain alignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The DID 520ERT3-120 is aimed at competitive riders and track-focused enthusiasts who need a race-ready chain that balances lighter weight with higher shock resistance and tensile strength. Choose this chain if you want a durable non-O-ring option built to withstand aggressive riding, frequent high-load events, and the wear demands of performance-oriented drivetrain setups.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the DID 520ERT3-120 an O-ring chain?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — the 520ERT3-120 is a non-O-ring racing chain designed for lower drag and lighter weight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the chain include a master link?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it ships with a clip-style (RJ) master link for installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"DID","offers":[{"title":"Default Title","offer_id":48082871746718,"sku":"B077K4DZ6F","price":172.84,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/did-520ert3-front-packaging.jpg?v=1785817279","url":"https:\/\/northtrailauto.ca\/products\/did-520-ert3-racing-chain-120-link-gold-non-o-ring-37-kn-tensile","provider":"North Trail Auto","version":"1.0","type":"link"}