Black bearing bearing headset 40 × 52 × 7 mm 45° / 45° mm HB-D2

BLACKBEARING D2 headset bearing – 40 × 52 × 7 mm (45°/45°)

The BLACKBEARING D2 is a high-quality sealed cartridge headset bearing designed for bicycle steering systems. It provides smooth steering performance, low friction, and long service life thanks to precision manufacturing and effective sealing.

Key features

• High-quality BLACKBEARING headset bearing
• Sealed cartridge construction
• 45°/45° angular contact design
• Low rolling resistance
• High protection against dust, mud, and moisture
• Chrome steel races and balls
• Precision-ground surfaces for smooth operation
• Durable grease for extended service life
• Designed for modern bicycle headset systems

Technical specifications

Compatibility

• Headset systems requiring a 40 × 52 × 7 mm bearing
• 45°/45° angular contact standards
• Specific integrated headset systems only
• Always verify exact dimensions and angles before installation, as these bearings are not universally interchangeable

In practice

The BLACKBEARING D2 headset bearing is commonly used as a replacement part to restore smooth and precise steering. Its sealed design protects against contamination, ensuring reliable long-term performance across road, gravel, MTB, and e-bike applications.