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The BB CXD MR 18307 LLB-bx is a high-performance ceramic hybrid ABEC-5 radial bearing engineered for smooth operation and longevity.Featuring XD-15 ceramic hybrid technology, it delivers ultra-low friction, high corrosion resistance, and exceptional durability.The LLB double-seal system ensures excellent protection against contaminants, making it ideal for high-performance cycling applications, including hubs, bottom brackets, and suspension systems.