{"product_id":"enduro-mr18307-2rs-ss-stainless-steel-cartridge-bearing","title":"Enduro MR18307-2RS-SS Stainless Steel Cartridge Bearing","description":"\u003ch2 data-path-to-node=\"11,0\"\u003eSovereign Core Defense: 440C High-Purity Stainless Steel Metallurgy Meets Dual-Lip Full-Contact Rubber Seals, Marine High-Pressure Lubrication, and Absolute Corrosion Immunity\u003c\/h2\u003e\n\u003cp data-path-to-node=\"11,1\"\u003eBanish crunchy, salt-corroded wheel hub rotation from your rolling setup, eliminate premature bearing pitting caused by humid coastal air or heavy trail mud, and restore a silky smooth, drag-free spin to your premium wheelset. The \u003cb data-path-to-node=\"11,1\" data-index-in-node=\"231\"\u003eEnduro MR18307-2RS-SS Stainless Steel Cartridge Bearing (18x30x7mm)\u003c\/b\u003e represents the absolute global benchmark for high-durability performance components—specifically engineered to solve the frustrating bearing failures suffered by riders training in wet, muddy, or coastal environments. Sourcing high-fidelity engineering small parts independently from international online warehouses often exposes you to frustrating shipping delays, single-item courier minimums, or unexpected port customs hold-ups at the border. Epic Sports handles all international logistics natively, straight to Nairobi. Built with premium stainless steel tracks and robust rubber shields, this cartridge bearing guarantees unrelenting performance block after block.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"11,3\"\u003eWhy the Enduro Stainless Steel Matrix Governs the Hub Core:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"11,4,0,0\"\u003e\n\u003cb data-path-to-node=\"11,4,0,0\" data-index-in-node=\"0\"\u003eHigh-Purity 440C Stainless Steel Alloy:\u003c\/b\u003e Uncompromising rust defense. Both the inner\/outer raceways and precision-ground Grade-10 balls are forged from premium 440C stainless steel, ensuring total structural immunity against rust, oxidation, and coastal salt spray.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,4,1,0\"\u003e\n\u003cb data-path-to-node=\"11,4,1,0\" data-index-in-node=\"0\"\u003eDual-Lip Full-Contact Dual Rubber Seals:\u003c\/b\u003e Advanced contaminant barrier. Outfitted with high-fidelity, continuous-contact rubber shields (2RS) that sit inside precision-machined inner race grooves to lock out fine trail dust, water ingress, and abrasive grit.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,4,2,0\"\u003e\n\u003cb data-path-to-node=\"11,4,2,0\" data-index-in-node=\"0\"\u003eHigh-Pressure Waterproof Marine Lubrication:\u003c\/b\u003e Extended internal lifespan. Packed to the brim with specialized extra-sticky marine grease that won't emulsify, wash out under pressure, or break down when subjected to heavy downpours.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,4,3,0\"\u003e\n\u003cb data-path-to-node=\"11,4,3,0\" data-index-in-node=\"0\"\u003ePrecision-Honed Mirror Raceways:\u003c\/b\u003e Ultra-low friction signature. The stainless steel tracking channels undergo a high-grade microscopic polishing process to minimize rolling drag, run incredibly quiet, and optimize wattage efficiency.\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,4,4,0\"\u003e\n\u003cb data-path-to-node=\"11,4,4,0\" data-index-in-node=\"0\"\u003eTailored 18mm Over-Sized Axle Architecture:\u003c\/b\u003e Engineered specifically to meet the high-load, tight-tolerance space envelopes of modern high-end bicycle rear hubs and specialized suspension linkages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"11,6\"\u003eTechnical Specifications \u0026amp; Product Architecture:\u003c\/h3\u003e\n\u003ctable data-path-to-node=\"11,7\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngineering Performance Variable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eTechnical Architecture \u0026amp; Product Specifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,1,0,0\"\u003e\u003cb data-path-to-node=\"11,7,1,0,0\" data-index-in-node=\"0\"\u003eIndustry Standard Part Sizing\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,1,1,0\"\u003e\u003cb data-path-to-node=\"11,7,1,1,0\" data-index-in-node=\"0\"\u003eMR18307 Fractional Configuration\u003c\/b\u003e \u003ci data-path-to-node=\"11,7,1,1,0\" data-index-in-node=\"33\"\u003e(18mm Bore x 30mm OD x 7mm Width)\u003c\/i\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,2,0,0\"\u003e\u003cb data-path-to-node=\"11,7,2,0,0\" data-index-in-node=\"0\"\u003eRaceway \u0026amp; Ball Metallurgy\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,2,1,0\"\u003eHigh-Purity \u003cb data-path-to-node=\"11,7,2,1,0\" data-index-in-node=\"12\"\u003e440C Martensitic Stainless Steel Alloy Matrix\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,3,0,0\"\u003e\u003cb data-path-to-node=\"11,7,3,0,0\" data-index-in-node=\"0\"\u003eSealing Shield Configuration\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,3,1,0\"\u003e\u003cb data-path-to-node=\"11,7,3,1,0\" data-index-in-node=\"0\"\u003e2RS Dual-Lip Full-Contact Synthetic Rubber Nitrile Seals\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,4,0,0\"\u003e\u003cb data-path-to-node=\"11,7,4,0,0\" data-index-in-node=\"0\"\u003eInternal Lubricant Compound\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,4,1,0\"\u003eHigh-Pressure \u003cb data-path-to-node=\"11,7,4,1,0\" data-index-in-node=\"14\"\u003eWaterproof Marine-Grade Fluid Grease\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,5,0,0\"\u003e\u003cb data-path-to-node=\"11,7,5,0,0\" data-index-in-node=\"0\"\u003eRadial Play Clearance Grade\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,5,1,0\"\u003e\u003cb data-path-to-node=\"11,7,5,1,0\" data-index-in-node=\"0\"\u003eC3 High-Clearance Spec\u003c\/b\u003e \u003ci data-path-to-node=\"11,7,5,1,0\" data-index-in-node=\"23\"\u003e(Prevents binding under heavy press-fit loads)\u003c\/i\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,6,0,0\"\u003e\u003cb data-path-to-node=\"11,7,6,0,0\" data-index-in-node=\"0\"\u003eEcosystem Optimization\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,6,1,0\"\u003eFits Mavic, specialized rear hubs, freehub bodies, and premium pivot links\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,7,0,0\"\u003e\u003cb data-path-to-node=\"11,7,7,0,0\" data-index-in-node=\"0\"\u003eFulfillment Status\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan data-path-to-node=\"11,7,7,1,0\"\u003eSecurely Stocked Natively in Kenya, 100% Factory Authenticity Verified\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 data-path-to-node=\"11,9\"\u003eSize Check \u0026amp; Dimensions Guide:\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11,10\"\u003eEnsure an absolute precise press-fit sizing match by checking your old bearing casing stamps or using a vernier caliper to cross-reference these exact physical dimension specifications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli data-path-to-node=\"11,11,0,0\"\u003e\n\u003cb data-path-to-node=\"11,11,0,0\" data-index-in-node=\"0\"\u003eInner Diameter (Bore Sizing):\u003c\/b\u003e 18 mm\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,11,1,0\"\u003e\n\u003cb data-path-to-node=\"11,11,1,0\" data-index-in-node=\"0\"\u003eOuter Diameter (Total Outer Ring Width):\u003c\/b\u003e 30 mm\u003c\/li\u003e\n\u003cli data-path-to-node=\"11,11,2,0\"\u003e\n\u003cb data-path-to-node=\"11,11,2,0\" data-index-in-node=\"0\"\u003eThickness (Casing Profile Width):\u003c\/b\u003e 7 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-path-to-node=\"11,13\"\u003eFrequently Asked Questions (FAQ) for Discerning Riders:\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11,14\"\u003e\u003cb data-path-to-node=\"11,14\" data-index-in-node=\"0\"\u003eWhat is the structural advantage of a 440C stainless steel bearing over a standard chromium steel bearing?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"11,15\"\u003eChoosing between the two options comes down strictly to balancing load capacity against environmental survival. Standard chromium steel bearings (like standard 52100 steel) are exceptionally hard and offer massive load ratings, but the moment water or sweat slips past the seals, the steel oxidizes rapidly, forming rust pits that ruin the smooth rolling tracks. \u003cb data-path-to-node=\"11,15\" data-index-in-node=\"363\"\u003eEnduro's 440C stainless steel is deeply enriched with chromium and carbon elements\u003c\/b\u003e, creating a self-healing anti-corrosion barrier. While chromium steel is slightly harder on paper, 440C stainless steel maintains its smooth factory tolerances infinitely better in the real world because it never rusts, pits, or flakes when exposed to coastal salt, rain, or sports drink spills.\u003c\/p\u003e\n\u003cp data-path-to-node=\"11,16\"\u003e\u003cb data-path-to-node=\"11,16\" data-index-in-node=\"0\"\u003eCan this MR18307 bearing be used in both wheel hubs and freehub bodies?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"11,17\"\u003eYes, absolutely. Because this bearing utilizes a standard caged retainer architecture to separate the balls, it spins with exceptionally low friction, making it \u003cb data-path-to-node=\"11,17\" data-index-in-node=\"161\"\u003ethe ultimate choice for high-speed spinning wheel hubs and freehub assemblies\u003c\/b\u003e (frequently found in premium hub brands like Mavic, or custom hub axles requiring an 18mm bore). Thanks to the structural rigidity of its 440C stainless steel casing and the high-contact 2RS dual rubber seals, it double-hats perfectly as a high-durability suspension pivot bearing for mountain bike frames that endure constant mud exposure and frequent washing.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"11,19\"\u003eAuthentic Local Stock – Skip Port Surcharges \u0026amp; Customs Hassles\u003c\/h3\u003e\n\u003cp data-path-to-node=\"11,20\"\u003eAvoid the extreme frustration of trying to buy small technical frame components, replacement hub bearings, and specialized workshop hardware from international online storefronts, only to face weeks of shipping delays, exorbitant courier freight minimums, or unexpected port clearance hold-ups at the border. Epic Sports handles all international logistics, bulk freight compliance, and customs handling natively. We provide guaranteed 100% authentic performance gear, local product support, and secure, trackable express delivery straight to your doorstep across Kenya.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Enduro MR18307-2RS-SS Stainless Steel Cartridge Bearing\",\n  \"image\": [\n    \"https:\/\/epicsports.cc\/products\/enduro-bearings-mr18307-2rs-ss\"\n  ],\n  \"description\": \"Authentic premium bicycle multi-purpose cartridge bearing engineered by Enduro Bearings. The MR18307-2RS-SS features high-purity 440C stainless steel inner\/outer raceways and balls for ultimate corrosion resistance, dual-lip 2RS full-contact rubber shields, and high-pressure waterproof marine grease. Dimensions: 18x30x7mm.\",\n  \"sku\": \"EN-BRG-MR18307-2RS-SS\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Enduro Bearings\"\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/epicsports.cc\/products\/enduro-bearings-mr18307-2rs-ss\",\n    \"priceCurrency\": \"KES\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"seller\": {\n      \"@type\": \"SportsActivityLocation\",\n      \"name\": \"Epic Sports\"\n    }\n  },\n  \"mainEntity\": {\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Are Enduro stainless steel bearings good for bike hubs?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes, exceptionally good. Enduro's 440C stainless steel bearings combine a low-friction caged design for fast rolling efficiency with complete immunity to rust and salt-water corrosion, making them perfect for premium rear wheel hub rebuilds.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What are the dimensions of an MR18307 bearing?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"The exact physical dimensions for an MR18307 series cartridge bearing profile are 18mm inner diameter (bore) by 30mm outer diameter by 7mm total thickness\/width.\"\n        }\n      }\n    ]\n  }\n}\n\u003c\/script\u003e","brand":"Epic Sports","offers":[{"title":"Default Title","offer_id":51134404952377,"sku":null,"price":2000.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0912\/9895\/5577\/files\/6903-2RS-MAX_3a504d34-0a8c-4c3e-986c-5da3e0b4953c.webp?v=1757311709","url":"https:\/\/epicsports.cc\/products\/enduro-mr18307-2rs-ss-stainless-steel-cartridge-bearing","provider":"Epic Sports ","version":"1.0","type":"link"}