Black bearing bearing ceramic 24 × 37 × 8 mm B5 24378-2RS UB-24378-C

BLACKBEARING Ceramic Hybrid 24378-2RS Bearing – 24 × 37 × 8 mm

EAN: 3760290196544
SKU: UB-24378-C
Brand: BLACKBEARING
Type: Hybrid Ceramic Deep Groove Ball Bearing (2RS)

The BLACKBEARING UB-24378-C is a premium-quality hybrid ceramic bearing designed for high-performance cycling applications. The 24378-2RS bearing features dimensions of 24 × 37 × 8 mm and is developed for precision rotating components where low friction, smooth operation, and long service life are essential.

The hybrid construction combines steel races with silicon nitride (Si₃N₄) ceramic balls, delivering reduced rolling resistance, improved efficiency, increased wear resistance, and longer service life compared to conventional steel bearings.

The double 2RS rubber sealing system provides effective protection against dust, moisture, and contamination while retaining lubricant inside the bearing for smooth and reliable performance.

Key Features

• Premium BLACKBEARING quality
• Hybrid ceramic construction
• 24378-2RS standard
• Double rubber seals (2RS)
• Silicon nitride (Si₃N₄) ceramic balls
• Excellent rolling efficiency
• Low friction
• High wear resistance
• Protection against water and dust
• Long service life

Technical Specifications

Applications

• Wheel hubs
• Freehub bodies
• Bottom bracket systems
• Derailleur pulleys
• E-bike components
• Other precision rotating components

In Practice

The BLACKBEARING UB-24378-C is an excellent choice for cycling applications where minimal rolling resistance and long-term reliability are critical. Thanks to its hybrid ceramic construction, the bearing delivers smoother operation and greater durability than conventional steel bearings.

With its 24 × 37 × 8 mm dimensions, this bearing is suitable for a wide range of premium bicycle components where precise fitment and efficient power transfer are essential.