A high-precision ceramic bicycle bearing, hand-built in Denmark, featuring Grade 3 silicon nitride balls, hardened steel raceways, a reinforced polyamide cage, non-contact seals, and factory-applied low-viscosity grease for ultra-low friction and extended life. Bearing dimensions are 15 mm inner diameter, 28 mm outer diameter, and 7 mm thickness. Weight is approximately 12.7 g net and 13 g gross.

• Weight: 12.7 g net 13 g gross
• Inner diameter 15 mm
• Outer diameter 28 mm
• Thickness 7 mm
• Grade 3 silicon nitride ceramic balls
• Hardened steel races
• Reinforced polyamide cage
• Non-contact seals
• Pre-lubricated with low-viscosity "Blue Grease"