{"title":"Race \u0026 Track Parts","description":"\u003cp\u003eRace-prep parts and consumables for full-size track and race bikes, from brands we run ourselves. Chains, sprockets, brake and drivetrain hardware chosen for durability over a race weekend rather than showroom shine.\u003c\/p\u003e\u003cp\u003eMost items here are marked racing use only. If you're looking for VMC and miniGP parts, those live under MiniGP Parts \u0026amp; Accessories.\u003c\/p\u003e","products":[{"product_id":"rk-gc415hru-140-racing-gold-chain-415-x-140-links","title":"RK GC415HRU-140 Racing Gold Chain - 415 x 140 Links","description":"\u003cp\u003eThe RK \u003cstrong\u003eGC Racing Gold Chain Series GC415HRU\u003c\/strong\u003e is a purpose-built sprint racing chain in 415 pitch, supplied here in a \u003cstrong\u003e140 link\u003c\/strong\u003e length with a clip-type master link included.\u003c\/p\u003e\n\n\u003cp\u003eThe GC series is RK's latest generation of the HRU racing chain. Both the inner and outer plates are polished and gold plated, which improves seal durability over the previous GB generation. Compared to that older chain, the GC delivers roughly \u003cstrong\u003e15% more strength, two to three times the durability, and about 10% less weight\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eAt the heart of it is RK's Ultra Thin U-Ring seal — under half the thickness of a conventional O-ring. That lets the chain hold its lubrication like a sealed chain while carrying close to the weight of an unsealed one, so it resists elongation over a race weekend and keeps power going to the rear wheel instead of into friction.\u003c\/p\u003e\n\n\u003ch3\u003eWhy a sealed chain is worth it\u003c\/h3\u003e\n\u003cp\u003eNon-sealed chains are cheap up front, but the grease gets flung out within a session or two and grit works its way straight into the pins and bushings. From there they stretch fast — most riders are chasing adjustment every weekend and replacing the chain two or three times a season.\u003c\/p\u003e\n\n\u003cp\u003eThe U-ring seals on the HRU keep the factory lubricant where it belongs and keep contamination out, so the chain holds its length instead of growing. \u003cstrong\u003eWe ran one of these for a full season of racing on our own bikes without replacing it\u003c\/strong\u003e — just routine cleaning and lube. Fewer adjustments, less sprocket wear, and one chain instead of a stack of them.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a 415 pitch chain, and 415 is a conversion.\u003c\/strong\u003e It is intended for race bikes that have already been converted to 415 with matching front and rear sprockets — the narrower pitch is a common race-prep step to cut rotating mass and drivetrain drag. A 415 chain will not run on 420 sprockets, so confirm your sprockets before ordering.\u003c\/p\u003e\n\n\u003cp\u003eRated for up to 250cc race \/ 60 HP applications. At 140 links it suits longer wheelbase and taller gearing setups; count the links on your current chain first. You can size down by removing links, but the chain cannot be lengthened.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e GC415HRU-140\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch:\u003c\/strong\u003e 415\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLinks:\u003c\/strong\u003e 140\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Gold plated inner and outer plates\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeal:\u003c\/strong\u003e Ultra Thin U-Ring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTensile strength:\u003c\/strong\u003e 4,800 lbs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRating:\u003c\/strong\u003e Up to 250cc race \/ 60 HP\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaster link:\u003c\/strong\u003e Clip type, included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eRacing use only.\u003c\/strong\u003e RK does not recommend the HRU series for street use.\u003c\/p\u003e","brand":"RK","offers":[{"title":"Default Title","offer_id":49154680422500,"sku":"GC415HRU-140","price":129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0656\/3771\/1972\/files\/GC415HRU.jpg?v=1788573554"}],"url":"https:\/\/malaracing.com\/collections\/race-track-parts.oembed","provider":"Mala Racing","version":"1.0","type":"link"}