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The Enduro 61901 LLU/LLB CN is an ABEC-5 radial bearing, measuring 12x24x6mm, ideal for quick-release hub designs and suitable as a pivot bearing. It features deep-groove races with Grade 10 balls, LLU full-contact outer seals for durability against elements, and LLB lighter-contact inner seals to retain 90% fill of high-pressure waterproof grease. The CN clearance is optimized for looser press-fit bearing bores, and its robust design ensures superior protection and performance.