{"product_id":"ek-chain-520-rrx-gold-gold-nx-ring-drive-chain","title":"EK Chain 520 RRX Gold\/Gold NX-Ring Drive Chain – Open with Rivet Link, 84 to 146 Links","description":"\u003cp\u003eWhen every lap demands the same from your drivetrain as the last, the EK 520 RRX NX-Ring chain in Gold\/Gold delivers the sustained, all-day confidence that serious track riders depend on. Proven in the JSB1000, Suzuka 8 Hours, ST600, and J-GP racing series, this is a chain engineered to feel as composed in the closing stages of a long track session as it does on the warm-up lap.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eNX-Ring seal technology minimises internal friction and maintains consistent lubrication throughout extended running, reducing power loss and keeping the drivetrain smooth session after session.\u003c\/li\u003e\n\u003cli\u003eTensile strength of 37.8 kN (8,500 lbs) provides a wide safety margin under hard acceleration and extreme load cycles without adding unnecessary mass.\u003c\/li\u003e\n\u003cli\u003eOptimised weight of 1.56 kg per 100 links keeps rotating mass to a minimum, sharpening throttle response and reducing drivetrain inertia on track.\u003c\/li\u003e\n\u003cli\u003eRivet-link connection — the preferred closure in professional racing — offers maximum joint security and eliminates the weak point associated with clip-type master links.\u003c\/li\u003e\n\u003cli\u003eGold\/Gold finish gives the chain its distinctive race-bred appearance while also providing an extra layer of corrosion resistance.\u003c\/li\u003e\n\u003cli\u003eAvailable in link counts from 84 to 146, making this a single solution for a wide range of 520-pitch fitments and custom gearing configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNX-Ring Technology: Efficiency Over the Long Run\u003c\/h2\u003e\u003cp\u003eThe NX-Ring is EK Chain's precision-shaped seal, designed to reduce contact area between inner and outer plates while retaining grease deep within the pin-and-bushing interface. Compared to conventional O-ring chains, the result is measurably lower friction, a relative service life rating of 3500, and a drivetrain that holds its efficiency long after a standard chain would have begun to stretch and wear. For riders who push hard over full track days or multi-race weekends, that consistency matters as much as outright peak performance.\u003c\/p\u003e\u003ch2\u003eTensile Strength and Rivet-Link Security\u003c\/h2\u003e\u003cp\u003eAt 37.8 kN (8,500 lbs) the RRX chain handles the shock loads generated by a high-powered 520-pitch application without compromise. The chain is supplied open — ready for custom link-count fitting — with a rivet-type master link included. Riveting the link rather than clipping it produces a joint that matches the strength of the chain's side plates, which is why every professional team running EK chain in circuit racing specifies this closure method. Proper rivet-link installation requires a chain breaker and rivet tool; always follow the manufacturer's installation guidelines.\u003c\/p\u003e\u003ch2\u003eWeight and Rotating Mass\u003c\/h2\u003e\u003cp\u003eAt 1.56 kg per 100 links, the 520 RRX sits at an excellent point on the strength-to-weight curve for a sealed racing chain. Lower rotating mass translates directly into sharper acceleration, more immediate engine-braking feel, and reduced stress on the sprocket carrier and wheel bearings — benefits that compound across the full duration of a track day rather than disappearing after the first corner.\u003c\/p\u003e\u003ch2\u003eGold\/Gold Finish\u003c\/h2\u003e\u003cp\u003eThe all-gold plating on both inner and outer plates is not purely cosmetic. The surface treatment adds corrosion resistance across the full chain length, which is particularly useful in variable track-day conditions where chains are exposed to brake dust, tyre debris, and temperature cycling. On a polished wheel and anodised sprocket combination, the Gold\/Gold finish also presents a clean, purposeful track aesthetic.\u003c\/p\u003e\u003ch2\u003eFitment and Compatibility\u003c\/h2\u003e\u003cp\u003eThe EK 520 RRX is compatible with any motorcycle running a 520-pitch drivetrain. The tag list covers an extensive range of machines from the following manufacturers and model families:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAprilia: RSV4, RSV4 R, RSV4 RR, RSV4 RF, RSV4 1100, RSV4 1100 Factory, RS 660, RS 457\u003c\/li\u003e\n\u003cli\u003eBMW: S1000RR, M1000RR, HP4, HP4R\u003c\/li\u003e\n\u003cli\u003eBimota: KB998 Rimini\u003c\/li\u003e\n\u003cli\u003eCFMOTO: 450 SR, 675 SR-R\u003c\/li\u003e\n\u003cli\u003eDucati: 848, 899, 959, 1199, 1199 S, 1199 R, 1299, 1299 S, V2, V2 S, V4, V4 S, V4 R\u003c\/li\u003e\n\u003cli\u003eHonda: CBR 600 RR, CBR 1000 RR, CBR 1000 RR-R\u003c\/li\u003e\n\u003cli\u003eKTM: RC 390, RC8 1190, 990 RC R\u003c\/li\u003e\n\u003cli\u003eKawasaki: ZX-4 RR, ZX-6R, ZX-10 R, ZX-10 RR, Ninja 400\u003c\/li\u003e\n\u003cli\u003eMV Agusta: F3, F4\u003c\/li\u003e\n\u003cli\u003eQJMotor: SKR 800 RR\u003c\/li\u003e\n\u003cli\u003eSuzuki: GSX-R 600, GSX-R 750, GSX-R 1000\u003c\/li\u003e\n\u003cli\u003eTriumph: Daytona 675, Daytona 675 R, Daytona 765, Daytona 765 Moto 2, Street Triple 765 R, Street Triple 765 RS\u003c\/li\u003e\n\u003cli\u003eVoge: V2 890, V2 S 890, V2 955\u003c\/li\u003e\n\u003cli\u003eYamaha: R1, R1M, R3, R6, R7, R9\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eAlways verify the required link count and pitch for your specific model and year before ordering. A 520-conversion sprocket set may be required on models that left the factory with a wider-pitch chain.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChain pitch\u003c\/td\u003e\n\u003ctd\u003e520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLink count\u003c\/td\u003e\n\u003ctd\u003e84–146 (selectable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight per 100 links\u003c\/td\u003e\n\u003ctd\u003e1.56 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative service life (per 100 links)\u003c\/td\u003e\n\u003ctd\u003e3500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeal type\u003c\/td\u003e\n\u003ctd\u003eNX-Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eTrack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColour\u003c\/td\u003e\n\u003ctd\u003eGold\/Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaster link\u003c\/td\u003e\n\u003ctd\u003eRivet link\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChain type\u003c\/td\u003e\n\u003ctd\u003eRRX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eEK Chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"EK Chain","offers":[{"title":"Gold\/Gold \/ 84 \/520","offer_id":53168601071882,"sku":"520RRX-G\/G 84 MLJ","price":124.95,"currency_code":"EUR","in_stock":true},{"title":"Gold\/Gold \/ 86 \/520","offer_id":53168601104650,"sku":"520RRX-G\/G 86 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