Enduro BKC-54115 XD15 Ceramic ABEC-5 Shimano BB Bearing Kit BB86/92 delivers a professional-grade bottom bracket upgrade. It packs XD-15 Ceramic-Hybrid ABEC-5 bearings with all seals and spacers for precise installation, maximizing durability and performance. The deep-groove races accommodate large Grade 3 Silicon Nitride ceramic balls for enhanced contact, longevity, and smooth operation, even under demanding riding conditions.