{"product_id":"enduro-bearings-61805-llu-llb-cn-abec-5-sealed-bearing-7mm-x-37mm-for-bicycle-hubs-bottom-brackets","title":"Enduro Bearings 61805 LLU\/LLB CN ABEC 5 Sealed Bearing 7mm x 37mm for Bicycle Hubs \u0026 Bottom Brackets","description":"\u003cp\u003eEnduro Bearings 61805 LLU\/LLB CN is engineered to deliver exceptional performance for bicycle components, especially hubs and bottom brackets. Crafted with 52100 High-Carbon Chromium alloy races and grade 5 balls with 90% fill, this bearing ensures durability and smooth rotation. Its advanced sealing system combines a robust LLU seal facing outward to shield against water and dirt ingress, while the lighter-contact LLB seal faces inward, maintaining optimal grease retention and minimizing drag.\u003c\/p\u003e\n\n\u003cp\u003eDesigned as a direct replacement for Shimano external cup bottom brackets using the plastic Shimano bearing insert, this bearing offers a reliable upgrade for cyclists seeking enhanced protection and longevity. Its precise 25mm x 37mm x 7mm dimensions and ABEC 5 rating guarantee high efficiency and reduced friction under demanding riding conditions.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding long-lasting, smooth performance in hubs and bottom brackets\u003c\/li\u003e\n  \u003cli\u003eProtecting against water, dirt, and contaminant ingress thanks to dual seal design\u003c\/li\u003e\n  \u003cli\u003eServing as a direct replacement bearing for Shimano external cup bottom brackets\u003c\/li\u003e\n  \u003cli\u003eMaintaining grease integrity to reduce maintenance frequency\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 requiring bearings without seals for minimal drag\u003c\/li\u003e\n  \u003cli\u003eUse without the compatible plastic bearing insert (for which a different model is recommended)\u003c\/li\u003e\n  \u003cli\u003eHeavy industrial machinery outside bicycle component specifications\u003c\/li\u003e\n  \u003cli\u003eEnvironments with extreme contamination beyond typical cycling conditions\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 without the Shimano plastic bearing insert?\u003c\/strong\u003e\u003cbr\u003eThe 61805 LLU\/LLB is designed to work with the plastic Shimano bearing insert. For use without it, the MR 2437 bearing is the recommended alternative.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes the LLU\/LLB seal combination special?\u003c\/strong\u003e\u003cbr\u003eThis seal setup uses an outward-facing LLU seal for strong protection against contaminants and an inward-facing LLB seal to reduce friction and keep grease inside, balancing protection and performance.\u003c\/p\u003e","brand":"Enduro Bearings","offers":[{"title":"Default Title","offer_id":45499492892847,"sku":"EB9740","price":12.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1638542013-46213200.jpg?v=1768523659","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/enduro-bearings-61805-llu-llb-cn-abec-5-sealed-bearing-7mm-x-37mm-for-bicycle-hubs-bottom-brackets","provider":"Swinnerton Cycles","version":"1.0","type":"link"}