{"product_id":"ceramicspeed-single-bearing-61903-18-for-cycling-high-performance-durability","title":"CeramicSpeed Single Bearing 61903\/18 for Cycling – High Performance \u0026 Durability","description":"\u003cp\u003eExperience unparalleled performance with the CeramicSpeed Single Bearing 61903\/18, meticulously handcrafted in Denmark for exceptional quality and precision. Featuring grade 3 Silicon Nitride ceramic balls, each bearing combines ultra-smooth polished hardened steel raceways with a reinforced polyamide cage to ensure superior durability and minimal friction. The innovative low viscosity CeramicSpeed “Blue Grease” enhances lubrication, extending the bearing's lifespan while maintaining peak efficiency.\u003c\/p\u003e\n\n\u003cp\u003eDesigned for versatility, this bearing excels across all cycling disciplines, including Road, TT, Tri, Track, Cross, and MTB. Thanks to non-contact seals, it effectively prevents dirt and moisture from compromising performance, delivering consistent power transfer and smoother rides. Rigorous hand inspections during assembly guarantee perfect matching of components, ensuring every bearing meets CeramicSpeed’s high standards for reliability and precision.\u003c\/p\u003e\n\n\u003cp\u003eCompared to conventional steel bearings, CeramicSpeed balls are 400% smoother, 128% harder, and 58% lighter, offering a remarkable upgrade in performance. They also outperform other ceramic balls by being 15% harder, withstanding 99% higher loads, and providing 100% smoother operation, making this bearing a trusted choice for cyclists seeking the ultimate in speed and longevity.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eReducing friction for enhanced power transfer and efficiency\u003c\/li\u003e\n  \u003cli\u003eProviding durability and long-lasting performance in diverse cycling conditions\u003c\/li\u003e\n  \u003cli\u003eEnsuring smooth and reliable rotation across multiple cycling disciplines\u003c\/li\u003e\n  \u003cli\u003eProtecting internal components from dirt and moisture with advanced sealing\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 non-cycling applications requiring different bearing specifications\u003c\/li\u003e\n  \u003cli\u003eSituations where bearing dimensions beyond 18mm inner diameter and 30mm outer diameter are needed\u003c\/li\u003e\n  \u003cli\u003eHeavy industrial or automotive use outside of the designed cycling context\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\/18 is suitable for MTB and designed to withstand the rigors of off-road cycling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the “Blue Grease” improve bearing performance?\u003c\/strong\u003e\u003cbr\u003eThe low viscosity Blue Grease reduces friction and wear, increasing bearing life and maintaining smooth operation under various conditions.\u003c\/p\u003e","brand":"CeramicSpeed","offers":[{"title":"Default Title","offer_id":45499479720111,"sku":"101271","price":79.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1689904513-55693200.jpg?v=1768523617","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/ceramicspeed-single-bearing-61903-18-for-cycling-high-performance-durability","provider":"Swinnerton Cycles","version":"1.0","type":"link"}