{"product_id":"m-part-cartridge-bearing-6904-2rs-20x37x9-for-bicycle-hubs-wheels-abec-3","title":"M Part Cartridge Bearing 6904 2RS 20x37x9 for Bicycle Hubs \u0026 Wheels, ABEC-3","description":"\u003cp\u003eThe M Part Cartridge Bearing 6904 2RS 20x37x9 offers reliable performance tailored for bicycles. Engineered with CrMo races and CrMo ball bearings hardened to HRC 61-66, it ensures durability and smooth rotation. The steel retainer and Multemp SRL (Kyodo Yushi) grease provide excellent protection against wear and friction.\u003c\/p\u003e\n\n\u003cp\u003eDesigned to meet ABEC-3 tolerance standards, this bearing matches the quality of original components used by top bike manufacturers. Its precise construction guarantees enhanced efficiency and longer lifespan, making it an ideal replacement part for your bike’s hubs and wheels.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsuring smooth wheel rotation and reduced friction\u003c\/li\u003e\n  \u003cli\u003eProviding durability with high-quality CrMo components\u003c\/li\u003e\n  \u003cli\u003eMaintaining optimal performance with factory-grade grease\u003c\/li\u003e\n  \u003cli\u003eMatching original equipment specifications for reliable fit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eApplications outside of bicycle hubs and wheels\u003c\/li\u003e\n  \u003cli\u003eHeavy industrial or automotive use\u003c\/li\u003e\n  \u003cli\u003eEnvironments with extreme contamination without additional sealing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this bearing compatible with all bike hubs?\u003c\/strong\u003e\u003cbr\u003eIt is designed to match specifications common in many bike hubs, but it’s best to verify compatibility with your specific model.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should the bearing be serviced?\u003c\/strong\u003e\u003cbr\u003eWith proper sealing and grease, regular maintenance depends on riding conditions, but periodic checks are recommended for optimal performance.\u003c\/p\u003e","brand":"M Part","offers":[{"title":"Default Title","offer_id":45499463794863,"sku":"CB-134","price":4.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1720177611-04779800.jpg?v=1768523576","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/m-part-cartridge-bearing-6904-2rs-20x37x9-for-bicycle-hubs-wheels-abec-3","provider":"Swinnerton Cycles","version":"1.0","type":"link"}