{"product_id":"ceramicspeed-single-bearing-61903-6903-for-cycling-high-performance-low-friction","title":"CeramicSpeed Single Bearing 61903 (6903) for Cycling – High Performance, Low Friction","description":"\u003cp\u003eExperience unparalleled performance with the CeramicSpeed Single Bearing 61903 (6903), meticulously handcrafted in Denmark to meet the highest standards. This bearing features CeramicSpeed grade 3 Silicon Nitride balls, precision-matched within microns to hardened steel raceways that boast an ultra-smooth polished groove. The reinforced polyamide cage securely holds the balls in place, ensuring consistent operation and durability.\u003c\/p\u003e\n\n\u003cp\u003eEach bearing is optimized with CeramicSpeed’s proprietary low viscosity “Blue Grease,” designed to minimize friction and extend bearing life significantly. Equipped with non-contact seals, the bearing keeps out dirt and moisture, guaranteeing reliable performance across all cycling disciplines—including Road, TT, Triathlon, Track, Cyclocross, and MTB. Enjoy smoother rides, improved power transfer, and longer-lasting components with this premium bearing.\u003c\/p\u003e\n\n\u003cp\u003eThroughout the assembly process, every bearing undergoes four thorough manual inspections to ensure perfect matching of all parts. Compared to standard steel bearings, CeramicSpeed balls are 400% smoother, 128% harder, and 58% lighter. They outperform other ceramic balls in the industry by being 15% harder, capable of handling 99% higher loads, and 100% smoother, making this bearing an exceptional choice for serious cyclists.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eInner Diameter: 17mm\u003c\/li\u003e\n  \u003cli\u003eOuter Diameter: 30mm\u003c\/li\u003e\n  \u003cli\u003eWidth: 7mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eReducing friction for smoother, more efficient rides\u003c\/li\u003e\n  \u003cli\u003eEnhancing power transfer during all cycling disciplines\u003c\/li\u003e\n  \u003cli\u003eExtending the lifespan of your bike components\u003c\/li\u003e\n  \u003cli\u003ePerforming reliably in various weather conditions thanks to effective seals\u003c\/li\u003e\n  \u003cli\u003eProviding lightweight yet durable bearing performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat It’s NOT Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eUse in applications requiring bearings outside the specified dimensions\u003c\/li\u003e\n  \u003cli\u003eEnvironments with extreme contamination beyond sealing protection\u003c\/li\u003e\n  \u003cli\u003eNon-cycling mechanical systems that require different bearing specifications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan this bearing be used for mountain biking?\u003c\/strong\u003e\u003cbr\u003eYes, the CeramicSpeed Single Bearing 61903 is suitable for MTB, offering durability and smoothness across rough terrains.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the “Blue Grease” improve bearing performance?\u003c\/strong\u003e\u003cbr\u003eIt reduces friction inside the bearing, leading to longer bearing life and improved efficiency during cycling.\u003c\/p\u003e","brand":"CeramicSpeed","offers":[{"title":"Default Title","offer_id":45499479687343,"sku":"101274","price":79.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1564409246-20812600.jpg?v=1768523628","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/ceramicspeed-single-bearing-61903-6903-for-cycling-high-performance-low-friction","provider":"Swinnerton Cycles","version":"1.0","type":"link"}