{"product_id":"enduro-bearings-mr-2437-llu-llb-cn-abec-5-bicycle-bottom-bracket-bearing","title":"Enduro Bearings MR 2437 LLU\/LLB CN ABEC 5 Bicycle Bottom Bracket Bearing","description":"\u003cp\u003eEnduro Bearings MR 2437 LLU\/LLB CN - ABEC 5 Bearing is engineered for precision and durability in demanding bicycle applications. Crafted with 52100 High-Carbon Chromium alloy races and grade 5 balls at 90% fill, this bearing ensures smooth rotation and long-lasting performance. The advanced dual-lip labyrinth seal design offers superior protection: the LLU seal faces outward to defend against water and dirt ingress, while the LLB seal faces inward to retain high-pressure, water-proof grease, maintaining optimal lubrication under all conditions.\u003c\/p\u003e\n\n\u003cp\u003eIdeal as a replacement for Shimano external-cup bottom brackets with 24mm OD spindle cranksets, this bearing delivers reliable, efficient power transfer and enhanced ride quality. Its compact dimensions of 24mm x 37mm x 7mm and ABEC 5 precision grade make it a perfect component for cyclists seeking high performance and endurance in their hubs and bottom brackets.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It’s Good For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProviding smooth, low-friction rotation for bottom brackets and hubs\u003c\/li\u003e\n  \u003cli\u003eResisting contamination from water, dirt, and debris thanks to the LLU\/LLB dual-lip seals\u003c\/li\u003e\n  \u003cli\u003eMaintaining grease retention for long-lasting lubrication and reduced maintenance\u003c\/li\u003e\n  \u003cli\u003eOffering a precise fit for Shimano external-cup bottom brackets with 24mm spindles\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 larger than 24mm x 37mm x 7mm\u003c\/li\u003e\n  \u003cli\u003eEnvironments with extreme heavy loads beyond typical bicycle use\u003c\/li\u003e\n  \u003cli\u003eNon-bicycle applications not compatible with ABEC 5 specification bearings\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 in all types of bicycles?\u003c\/strong\u003e\u003cbr\u003eIt is specifically designed for Shimano external-cup bottom brackets with 24mm OD spindle cranksets, so compatibility with other setups should be verified before purchase.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do the LLU\/LLB seals improve bearing performance?\u003c\/strong\u003e\u003cbr\u003eThe LLU seal prevents dirt and water from entering the bearing, while the LLB seal retains grease inside, ensuring smoother operation and longer bearing life under cycling conditions.\u003c\/p\u003e","brand":"Enduro Bearings","offers":[{"title":"Default Title","offer_id":45499493023919,"sku":"EB9748","price":12.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0654\/2003\/4223\/files\/1638542025-74354400.jpg?v=1768523664","url":"https:\/\/www.swinnertoncycles.co.uk\/products\/enduro-bearings-mr-2437-llu-llb-cn-abec-5-bicycle-bottom-bracket-bearing","provider":"Swinnerton Cycles","version":"1.0","type":"link"}